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  • Articles  (18)
  • Chemical Engineering  (18)
  • Condensed Matter: Electronic Properties, etc.
  • 2010-2014
  • 1980-1984
  • 1960-1964  (18)
  • 1962  (18)
  • 1
    Electronic Resource
    Electronic Resource
    Radiation and moisture effects in polymerized epoxy resinSupported in part by the U.S. Atomic Energy Commission under Contract at(30-1)-1858. (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 21-24 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effects of moisture and rather large doses of reactor radiation (∼4 × 1011 ergs/gm) on the dynamic properties of polymerized epoxy resins have been investigated over the temperature range of 80°-450°K and at frequencies from 200 to 1400 cps. Data are presented for both unfilled and aluminum-filled systems of a bisphenol A based epoxy, (Epon 828) cured with metaphenylenediamine. Moisture absorption (0.88%) causes a shift of the main glass transition near 440°K to lower temperatures (∼25 degrees for unfilled epoxy). This is similar to the plasticizing action of small molecules absorbed in other polymers such as nylon 6-6. Irradiation to a dose of 4 × 1011 ergs/gm (4 × 109 rads) causes a shift to lower temperatures (∼50 degrees) of the onset of the main transition, and, in addition, results in both a shift to lower temperatures and a decrease in maximum height of the damping peak near 250°K. Chain scission, in a loosening of the structure and the breaking up of the partially flexible connecting groups, may be responsible for these radiation effects.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020106
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of polymerization catalysts on the rate of degradation of isotactic polypropylene (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 25-27 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: One of the reasons for purification of low-pressure polymerization products is the assumed degradation effects of retained catalysts. Degree of degradation was determined from the change in viscosity number. Effects of catalysts on active sights and deactivation were noted along with degradation in the presence of air and oxygen in addition to determining, the effect of antioxidants. Individual components of the catalyst may have the ability to intensify the effect of any antioxidant and affect the rate of degradation where catalyst influence was better defined in the presence of oxygen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020107
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  • 3
    Electronic Resource
    Electronic Resource
    Sterospecific polymerization with alkali metal organic compounds (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 105-106 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020209
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  • 4
    Electronic Resource
    Electronic Resource
    High-pressure polymerization induced by gamma radiation (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 117-118 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020218
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  • 5
    Electronic Resource
    Electronic Resource
    Some further studies on the effect of glass-resin type and cure on the strength of laminates (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 332-336 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The technique of testing resin/glass laminates has been extended to include three alkali-containing glasses. NOL rings have been made by a direct filament drawing technique using an epoxide resin system. In each case the strength developed is less than with “E” glass.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020415
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  • 6
    Electronic Resource
    Electronic Resource
    The stereospecific homogeneous polymerization of vinyl chloride (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 294-297 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Polymerization of the monomer was investigated in organic solvents such as nitro-compounds, amines, amides, nitriles, ethers, esters, ketones, aldehydes, acids, anhydrides, and some heterocyclic compounds. Crystalline polyvinylchloride was produced in aliphatic aldehyde media at temperatures ranging from 0° to 60°C and highly crystalline polyvinylchloride was synthesized in the presence of preliminarily oxidized butyric aldehyde. The electron diffraction picture of the non-oriented specimen of the polymer exhibited 19 distinct reflexes.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020406
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  • 7
    Electronic Resource
    Electronic Resource
    Chromatographic fractionation of polyolefins (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 164-169 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The results compare favorably with those obtained by careful refractionation of fractions isolated by the precipitation method. A convenient parameter, U, related to the breadth of the molecular weight distribution can be calculated from the slope of the log-probability plot. When the plot is linear, U, is numerically equal to the ratio Mw/Mn. Values of U obtained for a number of commercial and experimental polypropylenes indicate that, with a given type of polypropylene, the breadth of the distribution increases as the average molecular weight of the sample increases, and that wide differences in distribution can be expected from polymers made by different processes.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020229
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  • 8
    Electronic Resource
    Electronic Resource
    The analysis of polymers for moisture and volatiles (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 231-236 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: An analytical method for the quantitative determination of the moisture and volatile content of polymeric materials is described. The method has been applied to polycarbonates, urethane elastomers and polyesters. It has been found particularly valuable for moisture determinations of polymers which have limited solubility in most common solvents and for polymers whose moisture content is in the range of 0.001%-0.01%. The moisture is expelled from the sample by means of heating under vacuum and collected in a cold trap. The vapor pressure of the water is then measured and correlated with the amount present in the sample. Volatiles, if present, can be determined by difference after removal of the water. Commercially obtainable equipment is employed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020311
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of normal stress on creep in tension and compression of polyethylene and rigid polyvinyl chloride copolymer (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 273-284 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: New apparatus suitable for compression creep tests of slender specimens is described. The apparatus is designed to prevent buckling and to introduce a minimum of friction. Results are reported for tension and compression creep of polyethylene and annealed, unplasticized polyvinyl chloride copolymer at 75 deg F and 50 per cent relative humidity. The stress, σ, strain ε, time t data from these tests were found to be describable with reasonable accuracy by the equation \documentclass{article}\pagestyle{empty}\begin{document}$$ \varepsilon = \varepsilon' \circ {\rm sinh }\sigma {\rm /}\sigma _\varepsilon + {\rm m't}^{\rm n} {\rm sinh }\sigma {\rm /}\sigma {\rm m} $$\end{document}where εm′, m′, σε and σm are material constants.The results for polyethylene show that the creep in tension and compression were virtually the same. Creep in tension was similar but larger than in compression for polyvinyl chloride.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020404
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  • 10
    Electronic Resource
    Electronic Resource
    Letter to the editor (1962)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 8 (1962), S. 135-142 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690080132
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