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  • 1
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    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 5 (1981), S. 6-13 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Measured Critical Oxygen Index values at 40°C for Opal polymethylmethacrylate (Perspex) sheet have been found to be remarkably dependent on the gas velocity within the column of the Hot Flammability Test Apparatus. Investigation of the atmosphere present in the column has indicated that the effect is almost solely attributable to varying quantities of ambient air entering the column as the flow rate is altered. A modification to the apparatus is proposed that successfully prevents this entrainment of air at normal testing flow rates.
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  • 2
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    Fire and Materials 5 (1981), S. 14-23 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper reports a set of modeling studies that were undertaken to acquire a more detailed knowledge of combustion inhibition mechanisms. Mixtures of H2/O2/Ar reacting in the idealized perfectly stirred reactor were investigated. Three H2/O2 kinetic mechanisms were considered, differing from one another by the number of HO2 reactions included. Two physical inhibitors, Ar and N2, and one chemical inhibitor, HBr, were investigated. Additional parameters considered were pressure, equivalence ratio, inhibitor concentration and rate coefficient variation. The most effective inhibitor was HBr which acted chemically and caused substantial reduction in radical concentrations in the mixtures considered. The molecules Ar and N2 acted as physical diluents with N2, the more effective of the two due to its larger heat capacity.
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  • 3
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    Fire and Materials 5 (1981), S. 24-32 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A test device consisting of an asbestos covered wooden cylinder was developed to study the burning behaviour of textiles relative to transmitted thermal energy and heat flux registered at 20 sensor points on the cylinder. In order to simulate a ‘line situation’ a reproducible procedure was used for igniting the fabrics at the hem edge by open flames. By linking known tolerance thresholds for second degree burn injuries in humans to the measured time patterns of transmitted thermal energy, the burning behaviour of a pure cotton twill, a 35/65% polyester-cotton twill and a 65/35% polyester-cotton twill was compared. All fabrics, which had no fire-retardant finishes, were also tested in combination with cotton underwear and in some of the experiments they were soaked with an inflammable solvent before ignited. In contrast to customary opinions it could be shown that in apparel burn accidents without inflammable solvents fabrics made from polyester-cotton blends are more advantageous with regard to the thermal energy transmitted to the skin of the wearer than fabrics made from cotton. Even when the burning clothes are soaked with an inflammable solvent, polyester-cotton blends are practically not more disadvantageous than 100% cotton fabrics.
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  • 4
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    Fire and Materials 5 (1981), S. 77-84 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: For building control purposes of wall-lining and flooring materials in Europe several empirical reaction to fire tests are used. This paper examines the correlation between a number of different tests looking at some 42 different materials, and comments thereon.
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  • 5
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    Fire and Materials 5 (1981), S. 85-85 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 6
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    Fire and Materials 5 (1981), S. i 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 7
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    Fire and Materials 5 (1981) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 8
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    Fire and Materials 5 (1981), S. iii 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 9
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    Fire and Materials 5 (1981), S. 112-122 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The characteristics of fire resistance test furnaces are examined. It is shown that the efficiency of a furnace, as measured in terms of the heat load it imposes on a test specimen, depends markedly on the size of the furnace and the nature of the furnace gas. Only with large furnaces heated by gases of high radiation potential (near-black gases) can the test results be regarded as meaningful and reproducible. Reling a defective furnace with a material of very low thermal inertia, though helpful, is unlikely to bring its performance up to the required level. Methods of determining the efficiency of test furnaces are outlined. The theorem of uniformity heat load is recognized as a succinct descriptor of fires with respect to their destructive potential. As such, it forms the basis for correlating real-world fires with standard test fires.
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  • 10
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    Fire and Materials 5 (1981), S. 128-130 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 11
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    Fire and Materials 5 (1981), S. 123-127 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This investigation examines the influence of sample dimensions on the Critical Oxygen Index, as determined on a Stanton Redcoft Hot Flammability Test Apparatus instrument. The materials used were polypropylene films in a range of thicknesses from 40 μm up to 300 μm and polymethylmethacrylate of 1600 μm thickness. Both the Critical Oxygen Index and the rate of spared of burn in the samples were determined. It is concluded that, for polypropylene, the sample dimensions were important in determining the Critical Oxygen Index and the rate of spread of burn and, further, that the ratio of the volume of material burned in unit time to the volume flow of oxygen in the same time remains constant, the value of the constant being 2.5 × 10 -4. For polymethlmethacrylate, in confirmation of the work of Fenimore and Jones, the sample dimensions were unimportant when investigating the Critical Oxygen Index, although the rate of burn by volume showed a significant increase with sample width. The volume ratio showed a corresponding increase.
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  • 12
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    Fire and Materials 5 (1981), S. 131-131 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 13
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    Fire and Materials 5 (1981) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 14
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    Fire and Materials 5 (1981), S. iii 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 15
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    Fire and Materials 5 (1981), S. 142-148 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Results of a study of time-dependent deformation of concrete over a period of five hours at room and elevated temperatures (22 to 649°C) are described. The influences of load, temperature and material variables are examined and data compared with several mathematical models commonly used to describe concrete creep behavior. Information obtained from this study will help in evaluation of the design of concrete structures to withstand fire and other high temperature environments.
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  • 16
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    Fire and Materials 5 (1981), S. 133-141 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The thermal decomposition of a number of TDI- and MDI-based biscarbamates (model compounds for polyurethane foams) between 200°C and 1000°C showed that the urethane linkage undergoes an O-acyl fission at about 300°C to generate the free isocyanate and alcohol. In the case of the flexible foam analogues, the newly generated TDI reacts further to generate volatile polyureas, termed ‘yellow smoke’. The MDI residues generated in the decomposition of a rigid foams react to yield non-volatile polycarbodiimides. Both the yellow smokes and the polycarbodiimides decompose above 600°C to give a mixture of nitriles (including HCN) as well as a number of olefinic and aromatic compounds. The use of 13C labeling indicated that HCN and all the other nitriles generated during the high temperature decompositions originate in the thermal fission of the aromatic ring, the nitrile carbon being the 2-, 4- or 6- carbon of MDI.
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  • 17
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    Fire and Materials 5 (1981), S. 149-152 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Gas chromatography using a column with a molecular sieve was applied to the determination of carbon monoxide in thermal degradation of polymeric materials. Attention was paid to the variance of individual determinations and conclusions were drawn regarding reproducibility of the processes studies. The carbon monoxide content in pyrolysis and thermooxidation products of the commonest polymeric materials and the effect of temperature on the amount of carbon monoxide formed were determined.
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  • 18
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    Fire and Materials 5 (1981), S. 153-162 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Ignitability, one of the new fire test methods for building materials developing within the International Standards Organization is compared with the national fire test methods in Austria, Britain, France, Germany and Scandinavia. Different commercial wood-based panels have been tested, including fire retardant treated panels. The International Standards Organization ignitability test measures the time to ignition at radiation intensities from 1 to 5 Wm -2; it seems to be able to distinguish between different materials in an intelligible way. An evaluation of the results of this ignitability test is discussed. One possibility which is proposed here is to calculate the mean time to ignition at different fixed radiation intensities; such a mean value simplifies the evaluation and takes into account all the test data. Agreement with the national fire test methods is rather low, since they partly measure other fire parameters; agreement with the Austrian Schlyter method, which also evaluated ignitability, is somewhat better and agreement between the national fire test methods is relatively good for wood-based panels. This is consistent with earlier experience, which has shown that mainly new types of materials behave differently according to different national test methods.
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  • 19
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    Fire and Materials 5 (1981), S. 177-178 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 20
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    Fire and Materials 5 (1981), S. 175-176 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 21
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    Fire and Materials 5 (1981), S. 179-179 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 22
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    Fire and Materials 5 (1981), S. 163-174 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The results of applying the tentative, high temperature, International Standards Organization test methods DP 5925 Part 3, which was developed to measure smoke leakage of door assemblies during the course of a standard fire endurance test, are reported. A critical analysis reveals that the basic objective of the test method is limited in its utility in that fire scenarios in high-rise buildings may not be adequately simulated. Independent of this limitation, the analysis then identifies certain theoretical problems with the test method and its procedures. These lead to a conclusion that the test method is not generally reliable. An alternative test concept which appears to remove this limitation and all of its problems is described, and its development is advocated.
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  • 23
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    Fire and Materials 5 (1981), S. 180-181 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 24
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    Fire and Materials 6 (1982), S. 54-58 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Owing to their low cost phosphorus fire-retardants find vast application in making fire-retardant cellulosic compostions. They have been used both as a physical additive as well as part of the polymer structure. Acid forming phosphorus compounds are generally effective in cotton and other cellulosic. Acidic retardants produce char via a dehydration process and this brings about the final fire-retardancy in phosphate-containing composition. High efficiency of phosphorus fire retardants in polyurethane foam has also been suggested to be the result of stable char formation. The char affects the flammability in the three following ways: reduction of flammable fuel, insulation by the char and coating by the non-volatile thermally stable phosphorous acids which screen the hot carbon from the oxygen. Nitrogen-phosphorus synergism in cellulose in controversial and evidence indicates that it is non existent in polymers.
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  • 25
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In recent year, increased attention, linked to the use of new structural design criteria and materials, has been given to maintaining the integrity of buildings and structures exposed to fire. Structures are now designed using lighter structural shapes and consequently differ from earlier, more traditional buildings, in terms of their resistance to the effects of the high temperature of fire. Contemporary structures are less expensive. Advance in building construction technology also result in faster erection.
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  • 26
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    Fire and Materials 6 (1982), S. 59-64 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The theromo-oxidative decomposition, flash ignition and burning of high-impact polystyrene containing the flame-retardant system decabromodiphenyl oxide + antimony trioxide was investigated using the Setchkin apparatus combined with mass spectrometry. The time dependences of the release rate of the main products into the gas phase during decomposition and burning showed that the flame-retardants markedly influence these processes. It was found that the retardants used exhibit an acceleration of the polymer degradation and that the efficiency of inhibition in the gas phase depends on the atomic ratio antimony: bromine.
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  • 27
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    Fire and Materials 6 (1982), S. 65-67 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Estimates of the errors in light extinction measurements of smoke resulting from forward scattered light entering the detector and from the spectral width of the light source are presented. It is shown for specific examples that each of these effects can lead to an error of about 25% in typical applications. A potential method for calibrating extinction instruments is described.
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  • 28
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    Fire and Materials 6 (1982), S. 68-71 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The development, construction, and testing of a gas-fired radiant heat source for use as part of a fire test method is described. The unit has been shown capable of operation over extended periods at surface temperatures yielding radiance corresponding to that of a black body at 935 °C. This permits a 60% increase of specimen irradiance over that possible with a burner previously used, without modifying the specimen-burner configuration factor. One such application of this burner allows operation with specimen irradiance levels at 5 W cm-2 or for short periods at levels approaching 7 W cm-2 at higher temperatures. This performance is achieved while maintaining effective spatial separation between specimen and heat source. This assists in avoiding imposition of vitiated air near the surface of a burning specimen. Some performance data are provided on its behavior when supplied with natural gas. The unit can burn propane but only with a significant reduction of thermal output.
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  • 29
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    Fire and Materials 6 (1982), S. 76-79 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In making fire safety decisions the designer often finds that some input variables concerning his problems are chance variables. As detailed statistical data are rarely available the designer must rely largely on his expert judgment. With the application of the Delphi method such decisions can be optimized and formalized. The essence of the Delphi method is described and its use illustrated through an example related to the assessment of fire resistance requirements.
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  • 30
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    Fire and Materials 6 (1982), S. 72-75 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A study of the 1979 UK fire statistics and the Annual Report of the Office of Population Censuses and Surveys shows that only 1 death per 1000 is attributable to toxic gases from combustion. However, of the ‘deaths by violence’ it rises to 30 (3%). As 37% of all fires in occupied buildings were confined to the first item ignited and 53% to the area of origin it is postulated that such fires (and the consequent deaths) largely concerned substances which will burn on their own. From experience these are largely materials with limiting oxygen indices below 22 or 22-28 for restricted burning only. Those with limiting oxygen indices 〉28 cannot on their own sustain combustion. These considerations suggest the mode in which toxic gas tests should be conducted, i.e., horizontally or vertically and vertically only for the first two groups, respectively, and in the presence of a fire sustainer for the limiting oxygen index 〉28 group. Wood in the form of a wooden crib is suggested as suitable. To this end some experiments are described with PVC placed on top of a No. 5 crib (PSA). These latter show that, making the best assumption possible from the existing data, the wood contributes about 63% to the toxicity and the PVC 37%. On the large scale, other work has shown that wooden cribs alone will give lethal concentrations of carbon monoxide for significant periods. Thus difficult-to-burn substances need to evolve gases of exceptional toxicity for their contribution to be worth considering.
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  • 31
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    Fire and Materials 6 (1982), S. 80-95 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: NBS burned eleven mattresses made up with bedding in two different rooms, typical of a residential bedroom and a nursing home patient room, respectively. Seven of the mattresses flamed and burned vigorously, the other four were of a construction or so heavily flame-inhibited that they only smoldered. The burning behavior of the seven that flamed was modeled with the Harvard Mark V fire simulation. The experimental burn behavior for tests conducted in one room was well reproduced using only total weight of combustible, surface area and heat of combustion. Smoke production values were found to have little effect on the predicted behavior except for the smoke production itself. Fires in a second room, whose ventilation was intentionally restricted by the configuration of the adjoining space, could not be as well reproduced by the present, single-room fire model. During this study several changes were made to the simulation. The most significant change was the inclusion of mixing of the hot exiting fire gases with the cold incoming air. As a part of this, the inter-layer radiation exchange was reformulated to include the effect of smoke contamination of the lower layer. The reformulation of the radiation model has a marked effect on the predicted upper layer gas temperatures, generally improving the quality of the simulation.
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  • 32
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    Fire and Materials 6 (1982), S. 98-98 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 34
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    Fire and Materials 6 (1982) 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 35
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    Fire and Materials 6 (1982), S. 119-121 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Melamine orthophosphate crystals vary in shape and formula according to their method of production. The types vary widely in their behaviour when incorporated into an epoxy resin intumescent coating for trials in a small scale fire test. Heat treatment of melamine phosphate crystals at 210 °C, a process designed to reduce their solubility, profoundly affects the performance of any crystal type in a fire test. In such cases crystal shape alone appears to determine performance, whereas the shape, formula, and state of agglomeration affect performance in coatings produced with untreated melamine phosphate. Small plates of side 20 μm heat treated at 210 °C, are the preferred type for optimum performance and weathering characteristics.
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    Fire and Materials 6 (1982), S. 111-118 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Notes: A fire test device suitable for small-scale, comparative testing as a first step in investigating the performance of fire retardant materials is described. The procedure developed is not intended to predict the performance of a given material in a real fire, since the local conditions can be extremely variable. However, the parameters in the device can be varied over a wide range to screen the performance of various materials in given situation. Typical results for an intumescent mastic consisting of epoxy resin, hardener and melamine phosphate are quoted, together with appropriate calibration curves. A method of estimating the thermal resistance of the developing char is also discussed.
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    Fire and Materials 6 (1982), S. 122-126 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Notes: A study has been made of the effect of antimony and molybdenum oxides on the temperature-critical oxygen index relationship of halogenated polyester thermosets. The polyesters were prepared from maleic anhydride, phthalic anhydride and propylene glycol, using either tetrachlorophthalic anhydride, tetrabromophthalic anhydride or chlorendic anhydride as the halogen source. Marked differences were observed in the effect of the two oxides. The critical oxygen index values of the halogenated polyesters containing maoybdenum (VI)oxide decreased with increase in timperature, which is in accordance with what is normally found for organic polymers, with and without additives. In contrast to this, the critical oxygen index values of the formulations containing antimony(II)oxide increased with increased with increase in temperature to reach a maximum value at around 100-150 °C. These results indicate that antimony(II)oxide is a better flame retardant than molybdenum(VI)oxide, since not only is it superior at the primary ignition stage but it shows enhanced activity at the higher temperatures which would be experienced by polymeric material in the early stages of a fire. It is concluded that higher temperature critical oxygen index studies provide a better guide to the flame retardant activity of additives than do ambient critical oxygen index determinations alone.
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    Fire and Materials 7 (1983), S. 38-40 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 7 (1983), S. 132-149 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: To assess the utility of a laboratory test for smoke and fume emission from overheated materials, six materials were heated to 500°C in larger amounts in three locations in an air-conditioned aircraft fuselage on the ground. Smoke, acidic or alkaline gases and carbon monoxide were monitored. It was shown that the laboratory test results could be a basis for predicting the smoke- and fume-emission behaviour of materials subjected to overheating, e. g. in aircraft in flight.
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    Fire and Materials 7 (1983), S. 128-131 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Notes: Smoke toxicity test methods which determine only lethal toxicological potency under ‘worst case’ conditions do not satisfactorily address the critical issue of relative hazard, including time-to-escape and tenability limits resulting from the fire performance of materials under comparable conditions. Since threats to escape from a fire are largely time-dependent, toxic insults produced by burning materials should also be considered as rate processes. Assessment of time thresholds exhibited by burning materials under test conditions to effect performance impairment (incapacitation) of an animal model would appear to be more relevant than lethal toxicological potencies in estimating probability of successful escape from fires. A model is advanced in which intoxication rate thresholds for materials are obtained using a rodent exposure test method. Concentration-time curves, obtained from experimentally derived concentration-time-response surfaces, are the basis for estimating rate thresholds which are distinctively different for each material and which vary as a function of test conditions. it is this performance impairment response surface which is potentially a key to the modeling of toxic hazards of smoke in perspective with other hazards presented by fire.
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    Fire and Materials 7 (1983), S. 157-162 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: The term ‘bed’ has a variety of meanings in different countries. In central Europe, ‘bed’ is used for a bedstead with a mattress, a duvet and a pillow, Following clear definitions of the components of a ‘bed’ the author considers methods for testing the burning characteristics of beds and reports on experiences with model beds in fire tests.
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    Fire and Materials 7 (1983), S. 150-156 
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    Notes: A device constructed and used to determine the flammability limits of pyrolysate-air mixtures as a function of percentage weight loss on pyrolysis has been employed to investigate the pyrolysate gases generated from poly (ethylene terephthalate) both in the presence and absence of chemical flame retardants. The chemicals tripropyl phosphate (TPP), dibromopropanol (DBP) and tris (2, 3 dibromopropyl) phosphate (TRIS) all influenced both the lower and upper flammability limits, with the largest effects being obtained when both phosphorus and bromine were present, followed by bromine only and then phosphorus only. The results indicate TPP has negligible condensed phase activity with only small gas phase action. DBP has no condensed phase activity but is a very active gas phase inhibitor. In contrast, TRIS has a detrimental effect upon the condensed phase reactions in that it is responsible for the formation of a more flammable pyrolysate gas mixture. Fortunately, its gas phase inhibition reaction is capable of reducing the overall flammability.
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    Fire and Materials 7 (1983), S. 180-184 
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    Notes: Flammability tests are difficult because of the complexity of burning processes and of safety considerations. Experimental fires only give a partial view of the combustion process. Owing to the dynamic processes occurring in the flame, tests are very sensitive to external influences. Use, therefore, of flammability test methods should be made only with a clear understanding of what is being tested. Only officially standardized and recognized test methods should be sued.
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    Fire and Materials 7 (1983), S. 173-179 
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    Notes: Polymeric Dielectrics are usually chemically complex, and it is attractive to establish techniques capable of providing a general assessment of material composition and thermal behaviour. Simultaneous thermal analysis (STA) is capable of providing such an assessment and complementing flammability studies. The use of STA in both of these roles is demonstrated for a number of polymer materials used in high-voltage cables. The materials investigated include various polyethylenes, ethylene-copolymers and filled polyvinylchloride formulations. Fingerprint identification of materials and the influence of chemical structure and additives on thermal behaviour is discussed. In particular the influence of antimony trioxide-chlorinated hydrocarbon flame retardants is examined. The application of STA information in guiding flammability studies is shown by example, and some potential routes for further development are also discussed.
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    Fire and Materials 7 (1983), S. 185-192 
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    Notes: Detailed quantitative studies are reported on the kinetics of acetonitrile pyrolysis using an isothermal quartz tubular flow reactor at 720-1033 K and 1 atm. Pressure using flow rates, in nitrogen, of 2-200 ml min-1. The pyrolysis of several other nitriles (acrylonitrile, propionitrile, methacrylonitrile and benzonitrile) has also been investigated qualitatively by pyrolysis-gas chromatography.
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    Fire and Materials 7 (1983), S. 193-201 
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    Notes: Fire retardants improve reaction to fire characteristics such as ignitability and flame propagation. This paper presents the toxicological results of tests performed on eleven pairs of untreated and treated materials, including woods, synthetic materials and textiles (both natural and synthetic). It is shown that the effects of fire retardants on toxicity results can be variable. In addition, the problem of the use of toxicity results is discussed more generally.
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    Fire and Materials 7 (1983), S. 210-215 
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    Notes: A Preliminary study of the thermal degradation of wool fabric was carried out under a wide range of oxidative degradation conditions including flaming combustion. Product collection methods and analysis conditions were designed to minimize secondary reactions. The degradation products obtained included a variety of organic nitriles and heterocyclic compounds as well as the usual aromatic and oxygenated products. Variations in moisture content and fire retardant level in the wool had little effect on the organic volatiles produced form the fabrics.
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    Fire and Materials 7 (1983), S. 202-209 
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    Notes: There is widespread concern at present about the fire risk form the use of modern materials in upholstery and other domestic articles. One of the main characteristics of fires in dwellings which start with the ignition of textiles or furniture is that they have a high casualty rate compared with other kinds of domestic fires. Most of the casualties form such fires occur in fires which start in upholstery or bedding, often accidentally ignited by smokers' materials. Asphyxiations by smoke is the commonest cause of death in ‘textile’ and ‘upholstery’ fires. This paper presents relevant statistical information on fires in dwellings attended by local authority fire brigades which result from the ignition of upholstery, bedding, other textiles or furniture and the casualties which these fires cause.
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    Fire and Materials 7 (1983), S. 216-218 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 8 (1984) 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 8 (1984), S. 6-9 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 8 (1984), S. 1-5 
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    Notes: The application of the results of any fire toxicity test is extremely difficult because of the complexity of the problem and the limitations of the test. This paper will discuss the potential use of test data in the decision-making process.
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    Fire and Materials 8 (1984), S. 10-16 
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    Notes: The mechanisms of incapacitation resulting from exposures to the thermal decomposition products of flexible and rigid polyurethane foams (PUF) were studied over a range of different temperatures under pyrolytic or non-flaming oxidative decomposition conditions. Individual cynomolgus monkeys were exposed to atmospheres increasing in separate experiments from very low concentrations until early physiological signs of incapacitation were detected. When flexible PUF was pyrolysed at 900°C and rigid PUF was oxidized at 600°C, clear atmospheres containing CO and HCN were produced and the signs of toxicity were very similar to those produced by HCN gas alone, consisting of an episode of hyperventilation followed by a semi-conscious state. Pyrolysis of flexible PUF at 600°C and 300°C produced a dense yellow smoke but no HCN. The signs, consisting of hyperventilation throughout exposure and dyspnoea afterwards, were consistent with pulmonary irritation, Since TDI monmer is not present at 6000 C it is concluded that some as-yet unidentified but highly irritant chemical species is present in smoke from flexible PUF.
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    Fire and Materials 8 (1984), S. 17-19 
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    Notes: Flame-retardant paints have been developed which can considerably upgrade the performance of combustible substrates in surface spread of flame test, but there is uncertainty as to their benefit in a real fire situation. This is partly owing to the lack of agreement on laboratory test methods and even of their value. Flame-retardant paints commercially available in the United Kingdom are of two types, the intumescent type and the antimony oxide type, and their mechanism of action is discussed.
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    Fire and Materials 8 (1984), S. 20-27 
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    Notes: The Swedisn box apparatus was modified to include an oxygen analysis of the exhaust gases to be compared with the conventional exhaust gas temperature measurement. A slow-burning material shows good correlation between the temperature measurement and the rate of heat release. A fast-burning material, however, consumes all the available oxygen, and the temperature measurement becomes a measure of only the thermal properties of the material.
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    Fire and Materials 8 (1984), S. 28-39 
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    Notes: A theoretical and experimental study of buoyant, axisymmetric, turbulent, diffusion flames is described. Measurements included profiles of mean velocity, mean temperature and mean concentrations of major species for flames having heat release rates of 1.67 and 8.51 kW. An integral model was developed and calibrated with both present and earlier measurements. Empirical constants account for flow entrainment and rates of fuel consumption. Overall, the integral model provided satisfactory predictions of bulk velocity, temperature and concentrations in both combusting and non-combusting plumes.
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    Fire and Materials 8 (1984), S. 40-48 
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    Notes: Progress in the field of theoretical prediction of fire resistance has been rapid in recent years. A procedure has been developed at the National Research Council of Canada for calculation of the fire resistance of structural members. The various steps in the construction of a mathematical model to calculate temperatures, deformations and strength are shown using as an example the calculation of the fire resistance of a cylindrical tubular steel column filled with concrete. A comparison of results calculated using the model with those of a fire test is also discussed.
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    Fire and Materials 8 (1984), S. 55-56 
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    Fire and Materials 8 (1984), S. 49-53 
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    Notes: The Fire Precautions Act 1971, in contrast with previous legislation, is directed exclusively to the provision of fire precautions in buildings after occupation. The system of control is by fire certificate and can be applied to a class of premise (listed in Section 1) by means of a designating order. In the case of any particular use of premise, the Secretary of State, under Section 12, may by Regulation, make provision as to precautions which are to be taken in relation to the risk to persons in case of fire.
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    Fire and Materials 8 (1984), S. 54-55 
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    Fire and Materials 8 (1984) 
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    Fire and Materials 8 (1984), S. 64-68 
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    Notes: More than 700 standardized rules for fire testing are used round the world in order to assess the fire safety of materials, products and constructions in different technical fields. This article discusses the reasons for this variety of test methods and evaluation systems and the attempts to create systematic models in this special field of material testing, including new suggestions and developments in ISO and CIB for future approaches.
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    Fire and Materials 8 (1984), S. 57-63 
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    Notes: Laboratory tests have been developed that evaluate realistically the protective performance of clothing materials and garments. Test conditions are chosen to stress the high temperature resistance of materials in the same manner as in an industrial flash fire exposure. A second degree burn in human tissue is used as the criteria to ate performance of materials. Test results have been correlated between the small-scale lab swatch test and a full-scale instrumented manikin garment test, and these results related to industrial experience. The TPP lab test has been found useful in evaluating the performance of candidate materials as replacement for existing materials with known acceptable protective performance. It can be used to specify the level of protection needed in a garment when the intensity of the exposure hazard is known. Also, the test is especially useful for developing new materials and selecting candidates for additional field testing.
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    Fire and Materials 8 (1984), S. 77-80 
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    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Normalized heart load, obtained by dividing heat absorption by thermal inertia, is a quantity useful in building design for relating fire severity in fully developed compartment fires to fire severity in standard fire resistance tests. Harmathy has shown how normalized heat load may be used for determining required fire resistance in projected buildings. The present work describes how effective values of thermal inertia can be calculated for such important materials as brick and concrete, both normal and lightweight, for which thermal properties depend strongly upon temperature.
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  • 66
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    Fire and Materials 8 (1984), S. 69-76 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Some examples of the application of fire tests to hazard and risk assessment and some of the problems to be encountered are described. Reference is made to theoretical studies designed to show how to obtain basic data on material properties from ignitability and flame spread tests, and recent correlations of the rate of heat release required to cause flashover are presented. Progress in predicting fire growth from theory for certain idealized conditions will increasingly condition the choice of which processes shall be the subject of tests.
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  • 67
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    Fire and Materials 8 (1984) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 68
    ISSN: 0308-0501
    Keywords: Combustion of plastics ; combustion properties ; fire tests ; heat of combustion ; ignitability ; oxygen consumption ; rate of heat release ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new bench-scale rate of heat release calorimeter utilizing the oxygen consumption principle has been developed for use in fire testing and research. Specimens may be of uniform or composite construction and may be tested in a horizontal, face-up orientation, or, for those which do not melt, in a vertical orientation. An external irradiance of zero to over 100 kW m-2 may be imposed by means of a temperature-controlled radiant heater. The rate of heat release is determined by measuring combustion product gas flow and oxygen depletion, while the mass loss is also recorded simultaneously. The instrument has been designed to be capable of higher accuracy than existing instruments and yet to be simple to operate and moderate in construction cost. The instrument is thermed a ‘cone calorimeter’ because of the geometric arrangement of the electric heater.
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  • 69
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    Fire and Materials 8 (1984), S. 96-104 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: ‘Normalized heat load’ is a quantifier of the destructive potential of fires, real-world compartment fires and test fires alike. For real-world fires it is subject to some uncertainties owing to the random nature of two of the variables it depends on: ventilation and fire load. For test fires also it is subject to uncertainties owing to a moderate degree of randomness that characterizes the results of test fires. A procedure is described for predicting the failure probability in fire of the boundaries of a compartment designed for fire resistance on the basis of information concerning the characteristics of the compartment and the design value of the fire load. The procedure is essentially deterministic, employing statistical considerations only as far as required by the nature of some of the input variables. With the aid of second-moment analysis, it is possible, furthermore, to design the compartment boundaries for appropriate target failure probabilities.
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  • 70
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    Fire and Materials 8 (1984), S. 105-111 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: An interactive computer program for simulating the early fire growth in an enclosure is described. The enclosure is assumed to be divided into distinct homogeneous zones. The rate of heat release is defined for the fire and the conservation equations are solved for the zones, yielding the temperature and radiant heat conditions in the fire room. The purpose of the work was to develop a computer program to be used by people working with fire engineering applications and having little experience in computer calculations. The user converses with the program via a terminal connected to the computer. The dialogue is governed by commands adapted to the concepts of the user. Results of the computer model are compared with measured data of the burning of wood and plastic cribs in an enclosure, showing a good agreement between measured and calculated results.
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  • 71
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    Fire and Materials 8 (1984), S. 113-124 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The general nature of fire problems on energy-conservative passenger trains is described, including a description of vehicle structures and lightweight design. Effects of high energy demand, tunnels and high maximum speeds on fire safety are outlined. The considerations used in design analysis are described, beginning with the development of a ‘worst-case fire scenario’. Typical combustible materials are considered and some of the reasons for choices are given. Notes on cavity and chimney effects emphasize the importance of clear objectives. Structural fire resistance is examined, and the basis of conventional recommendations analysed. The application of British Standard 6336 guidelines on fire tests and hazard assessment is examined. Limitation of fire load density is described, and some problems of calorific value determination outlined. Sources of ignition and hazards from passengers are defined. Flammability and flame-spread control are discussed, and rate of heat release is referred to in the context of fire behaviour. Problems of passenger escape linked to flashover, smoke and combustion gases are dealt with briefly.
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  • 72
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    Fire and Materials 8 (1984), S. 137-147 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Measurements of the limits of flaming and smoldering combustion and relative rates of burning under elevated temperatures and oxygen-depleted conditions have been used to characterize the fire behaviour of polymeric materials using a semi-empicical approach (based on scientific theory) in terms of Power Law Indices. The work was based on modified current tests; namely the Limiting Oxygen Index (ASTM D2863) at elevated temperatures and the Setchkin Flash and Self-Ignition Test (ASTM D1929) modified to operate in oxygen-depleted atmospheres and to record rate of weight loss. Results show that the relative flammability and rate of burning of materials can change markedly with fire environment, and confirms the need to test materials lunder conditions representative of those of the anticipated end-use hazard.
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  • 73
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    Fire and Materials 8 (1984), S. 224-226 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: The vague meaning of the word ‘burning’ has long created communication difficulties among fire scientists, and has to unwarranted conclusions. It is suggested that the word ‘burning’ be used as an umbrella term, covering up to three dissimilar types of reactions: pyrolysis or gasification, (gas-phase) combustion, and char-oxidation.
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  • 74
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    Fire and Materials 9 (1985) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 75
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    Fire and Materials 8 (1984), S. 206-216 
    ISSN: 0308-0501
    Keywords: building materials ; fire tests ; heat release rate ; oxygen consumption ; spectral energy distribution ; weight measurement ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Equipment has been developed for measuring the rate of heat release from building materials in an open test arrangement. The method is based on an oxygen consumption technique. A vertical sample is placed under an open hood in which the combustion gases and a certain amount of air are collected. The decrease in oxygen concentration and the mass flow of the gases are measured in the exhaust duct. The rate of heat release is then calculated. The equipment has been calibrated with good agreement between input and measured effects. The total response time for the system is 10s. The method has been used for testing building materials at radiation intensities up to 5W Cm-2. It is able to distinguish between different board materials, and the repeatability is good, The paper describes the equipment, including the weighing of a burning sample and the selection of test condition. Smoke and gas analysis can be added when desirable. Some test results with building materials are also presented.
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  • 76
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    Fire and Materials 9 (1985), S. 30-35 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Smoke-obscuration of monochromatic (0.632μm) light helium-neon lasers and of broad-band continuum light a hot tungsten filament is reported. The effect of forward-scattered light is evaluated for the monochromatic source, and the degree to which the Bouguer law is obeyed for a non-monochromatic source is discussed. Practical experience with both small-scall and fire experiments is described.
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  • 77
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    Fire and Materials 9 (1985), S. 1-8 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A review is presented of the gaseous combustion and pyrolysis products evolved from coal, wood and PVC. Information has been collated on the range of products evolved, the temperatures of evolution and the effect of different ambient conditions (e.g. oxidizing of inert conditions). The data for coal have been subdivided into those from which rates of gas evolution have been or can be derived and those from which this is not possible. Probable decomposition routes for PVC and for wood are discussed. Although all three materials have been widely studied, the correlation between the work of different authors in not always good. The data obtained are dependent on the form of the experiment, and there are gaps in the information available, especially information on the rates of evolution of products of products as a function of temperature.
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  • 78
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    Fire and Materials 9 (1985), S. 23-29 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The performance of zine oxide gas large-scale experiments in an experimental underground mine roadway has been investigated. The sensors were in a simple prototype instrument and the response to products evolved from heated coal wood and PVC conveyor belt was determined. The response was measured as a function of sensor distancef from the combustion products, the ventilation rate in the roadway and the mass of coal dust used. Limited analuysis of the roadway air was also carried out. The results are compared with those obtained in laboratory studies1 and suggest that the sensors respond mainly to inorganic gases, e.g. CO, H2, H2S, HCl, and in the case of wood, acetic vapour at concentrations of about 1ppm. The experiments confirm the potential of the sensors as a means of detecting heating involving coal, wood and PVC conveyor belt.
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  • 79
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: An analysis, using gas chromatography and gas chromatography-linked mass spectroscopy, of the major products evolved as a function of temperature from coal, wood and PVC conveyor belting is described. The effect of these products, both collectively and as individual species, on the electrical properties of zinc oxide gas sensors has been investigated: the conductance of the sensors was measured in air containing either the total products evolved from the heated materials or the individual products eluted from a gas chromatographic column. Thus, the products from the different materials which make up the total zinc oxide gas sensor response at different material temperatures were identified. For coal dust heated in air the sensors responded to aromatic hydrocarbons H2 and CO, which were evolved between 100° and 200°C. For coal heated in nitrogen the sensors responded to the aromatic hydrocarbons evolved between 100° and 170°C. For PVC conveyor belt heated in air, the low temperature response was to the low levels of HCl evolved below 200°C. Finally, for hardwood dust heated in air the sensors responded primarily to the acid vapour evolved between 170° and 200°C.
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  • 80
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    Fire and Materials 9 (1985), S. 135-144 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The feasibility of oxygen-consumption calorimetry to testing of non-combustibility of building materials is studied. The reasons for the ambiguities of the traditional test method are qualitatively discussed. The construction of the gas collecting system added to the conventional test apparatus is described and the necessary formulae for calculating the oxygen consumption and the simultaneously measured conventional test variables are compared. The results clearly suggest that oxygen-consumption calorimetry is a consistent and powerful method for determining the non-combustibility of building materials.
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  • 81
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    Keywords: Chemistry ; Polymer and Materials Science
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    Notes: Experimental thermal conditions conducive to the production of high levels of hydrogen cyanide (HCN) from flexible polyurethane foam were determined. In these experiments the material was exposed to relatively low-temperature non-flaming oxidative conditions for a short time period, during which a char was formed. Further heating of the char to temperature above 500°C generated the increased HCN levels. Upon exposure to this same two-step decomposition process, a fire-retarded flexible polyurethane foam produced twice as much char and twice as much HCN. Elemental analyses indicated that the HCN concentration was directly related to the amount of char formed and its nitrogen content. Room burns of slabs of flexible polyurethane foam and chairs containing flexible polyurethane foam indicated that this same phenomenon occurs in large-scale experiments. In these NBS tests, increased concentrations of HCN were produced when the material underwent flaming combustion following a period of smoldering, presumably from heating the char that was formed during smoldering. Investigation of the molecular mechanisms responsible for the increased HCN concentrations was attempted using ion chromatography, electron spectroscopy for chemical analysis (ESCA), Fourier transform infrared (FTIR), pyrolysis/mass spectrometry and 13C solid-state nuclear magnetic resonance (NMR) techniques. While the molecular structures of the nitrogen-containing compounds in the char were not elucidated, these analyses provided evidence of multiple compounds containing amine, amide, imine and nitrile functional groups as the most likely sources of the observed HCN.
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  • 82
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    Fire and Materials 9 (1985), S. 145-149 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The study of char residues after thermal degradation of synthetic polymers, especially the identification of their morphology, structure and chemical composition is presented in this paper. Special attention was focused on the polystyrene, PVC and polyamide char residues. By means of microscopy in reflected light and reflected polarized light the manifestations of optical anisotropy were observed. X-ray analysis was used for the examination of the microstructure of PVC char residues carbonized at temperatures above 1000°C. For PVC char residues the electric resistivity was determined. The results have proved the close connection between the structure and properties of char residues and the intensity and course of thermal degradation of polymers.
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    Fire and Materials 9 (1985), S. 192-197 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The International Conference Interflam'85 was held at the University of Surrey, Guildford, UK, on 26-8 March 1985. This third conference in the Interflam series was set up with the specific aim to bring together the 1985 state of the art of fire science and to show particularly how this information can be put to practical use in the saving of lives. Over 45 speakers, each specialists in their own field of work, some 15 different countries contributed papers. Dr Peter Allender, formerly of Metro-Cammell and now with John Allen Associates, has seen the Conference both from the lecturing platform and from the audience. He has been invited to give his views about Interflam'85.
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    Fire and Materials 9 (1985), S. 200-201 
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    Keywords: Chemistry ; Polymer and Materials Science
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    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 9 (1985), S. 201-201 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
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  • 87
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    Fire and Materials 10 (1986) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Fire and Materials 10 (1986), S. 7-10 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Phosphorus and Bromine flame retardants decrease the time of self-ignition delay and increase the mass rate of burning of polypropylene even though the limiting oxygen index (LOI) at ambient temperature is higher. The proposed model which combines ignition, steady burning and extinction shows that the phenomenon can be explained only by an increased rate of polymer volatilization caused by flame retardant.
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    Fire and Materials 10 (1986), S. 1-6 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: A method based on exposure of mice in the CAB 4.5 smoke chamber for the evaluation of the biological toxicity of the products of flame and smoldering combustion of polumeric materials has been developed. A toxicity index, characterizing the danger from the products of combustion of the test polymer under the given conditions, was proposed on the basis of values of the concentration of carboxyhaemoglobin in the blood of the test animals, attaining charateristic critical limits (lethal limit) and LC50 values.
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    Fire and Materials 10 (1986), S. 21-28 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Large-scale fire experiments have been carried out in a special test rig to study the chemical nature of fire atmosphere using a ‘fingerprint’ sampling and analysis method. Four polymeric materials - wood, polypropylene, polymethyl methacrylate and polystyrene foam - were used separately as fuel, with both high and low ventilation. In addition to oxides of carbon the fingerprints yielded typically between twenty and forty different chemical compounds including several (e.g. aldehydes) which could contribute significantly to the irritancy of the fire gases. The change in nature of the fingerprint gases with the different ventilation conditions, different polymeric materials and with different stages of the same fire is discussed, together with the toxicological significance of the results.
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  • 91
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    Fire and Materials 10 (1986), S. 11-19 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Combustion gases were produced from several cable-insulation materials in separate experiments conducted in a model fire chamber. These gases were then allowed to interact with stressed metal specimens, consisting for the most part of various stainless and hardened steels as well as of carbon steel and stainless steel sheet. Thereafter the samples as exposed were stored in a humid atmosphere. As expected, PVC combustion gases caused the cracking of spring steel and also extensive pitting corrosion of stainless steel. These results confirmed that test conditions conformed to real-life fires as observed in practice. The combustion gases deriving from fluorinated polymers were much less corrosive on stainless steel and provoked only slight pitting in isolated cases. The rate of corrosion damage on carbon steel was lower by more than an order of magnitude than in the case of PVC. However, stress corrosion of sensitized 18/8 stainless steel and spring steel was found to occur. Tests on the thermal degradation of the dluorinated polymer ‘Teflon’ FEP and ‘Tefzel’ confirmed their high stability. If one compares the behaviour of these fluoroplastics with that of PVC it can generally be concluded that, although the use of fluorinated insulation materials on cables might not altogether eliminate corrosion problems in the event of fire, it does constitute a realistic contribution to fire protection and to the reeducation of fire-related damage.
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    Fire and Materials 10 (1986), S. 29-39 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: Both ignition and rate of fire development tests are required to determine the fire performance of upholstered composites. Current practice uses small-model specimens for ignitability tests but rate of burning tests are usually carried out on actual furniture. This paper discuss small- and large-scale tests for upholstered furniture.
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    Fire and Materials 10 (1986) 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
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    Fire and Materials 10 (1986), S. 47-55 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
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    Notes: This theoretical and experimental study, complementary to that discussed in Reference 1, examines those factors that affect the ‘test efficiency’ in fire resistance testing. Convective heat transfer in the test chamber may become an essential part of the heat transmission process if, due to small furnace size or non-luminous furnace gases, the radiative transmission is not sufficiently intense. The standard technique of measuring and controlling the temperature conditions in the furnace chamber, though not in line with strict scienctific practices, appears to provide insurance against poor test result. A calibration procedure is described for checking the adequacy of fire resistance test facilities and some solutions presented for improving the test efficiency.
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    Fire and Materials 10 (1986), S. 41-46 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Studies have been carried out of the effects of (1) anhydrous tin (IV) oxide and (2)β-stannic acid {hydrous tin (IV) oxide} on the flammability and smoke production of unsaturated polyesters into which halogen may be introduced as a reactive monomer during the resin synthesis. The results obtained provide evidence for a marked falme-reatedant synergism between tin and halogen, accompanied by a significant reduction in smoke from the burning polymer. The hydrous tin compound was found to be more effective than the anhydrous SnO2 both as a flame retardant and a smoke suppressant. At a 2% incorporation level β-stannic acid gave polymers with LOIs of up to ca 30 and reductions in smoke density of 50% or more compared with the standard non-halogenated resin. The mode of action of the tin compounds appears to involve both the condensed and vapour phases. In view of the generally accepted low toxicity of inorganic tin chemicals their possible use as fire-retardant additives for polymer systems should merit serious consideration.
    Additional Material: 3 Ill.
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  • 96
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 57-62 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A sensitive method is described for the determination of hydrogen cyanide and organic nitriles in atmospheres created by the combustion or thermal degradation of nitrogen-containing polymeric materials. The technique also allows for the determination of other hydrocarbon species from the same sample using a gas chromatograph-mass spectrometer system without entailing too many divisions in the sample quantity The method utilizes an NOx analyzer will only respond to nitrogen-containing compounds and response factors for these compounds can be calculated.
    Additional Material: 6 Ill.
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  • 97
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 63-69 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The hazards resulting rom smoke emission were widely recognized in the early 1970s as a result of several major fire disasters. Since that time considerable interest has been shown in the development of smoke-suppressants. This paper reviews some of the very promising results that have been obtained using molybdenuem comounds as flame-retardants and smoke-suppressantes in halogenated polymers. They have been shown to be effective in both rigid and flexible grades of PVC. In the rigid grades these compounds can reduce smoke emission by at least 80%. Reductions in excess of 50% have been observed with typical plasticized formulations, although the magnitude of the effect here depends on both the type and level of plasticizer. Comparisons of the results of different smoke tests suggest that the small-scale tests commonly used do not fully reflect the true extent of the smoke-reductions that are obtainable with these combounds. Significant reductions in smoke-emission have also been obtained with halogenated polyester thermosets and chlorinated elastomer formulations. With the polyesters some of the best results occurred when molybdenum oxide was used in conjunction with alumunium trihydrate. In all cases these compounds proved to have significant flame-retardant properties. Reference has been made in the paper to their mode of activity but the actual mechanistic investigations have not been discussed in detail.
    Additional Material: 8 Tab.
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  • 98
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A two-storey test rig was used to investigate how an insulated facade would react to the impingement of a simulated room fire. In particular, whether or not a facade insulated with polyurethane foam would promote vertical flame spread. Wooden cribs weighing 40 kg were used as fire sources. One set of tests was run without any steel cladding to study the behaviour of the polyurethane foam alone. In a wall-configuration test as well as under a conrner-configuration one limited vertical and horizontal flame propagation were found. The degree of damage was to some extent, greater under the corner-test conditions than with the wall tests. A ventilated facade construction with the profiled steel cladding fixed to vertical support-work was used for the second set of tests. In order to simulate repair conditions, the outer metal cladding was completely removed from the lower 1.5 m of the facade. In Both tests a strong chimney-effect behind the cladding was observed. This intensification of the flame impingement led to a flame spread up the top of the facade. The tests indicated that the vertical flame spread would continue unless the method of construction incorporated vertical fire stops.
    Additional Material: 12 Ill.
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  • 99
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 71-77 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A series of materials were tested in a radiant furnace for their production of toxicants (carbon monoxide and hydrogen chloride) while concurrently measuring the weight remaining of the test specimen. In addition, the effect of sample form on toxicant production was considered for Douglas fir and polyvinyl chloride. The smoke-exposure profile was found to be dependent on the material's form. The specimen-irradiation time and the incident heat flux. The calculation of exposure using a Ct product based on the area under the production curve was found useful for smoke and toxicants. Concentrations of toxic gases produced were not linearly related to sample-weight loss throughout the experiments. The influence of sample form on smoke and toxicant production was greater for Douglas fir than for polyvinyl chloride. The results indicate that in toxicity tests samples should be tested in their end-use form and that a material's thermal properties may influence toxicity-value calculations.
    Additional Material: 10 Ill.
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  • 100
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 91-91 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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