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  • Polymer and Materials Science  (59)
  • 2000-2004
  • 1960-1964  (59)
  • 1964  (59)
Collection
Publisher
Years
  • 2000-2004
  • 1960-1964  (59)
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2923-2933 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: In this review a short outline of the results of the application of IR-spectroscopy to the study of polymer physics is summarized. Questions of rotational isomerism, mechanical deformation of polymers, crystallization, intramolecular order, and microtacticity determination are discussed. Details are given on the authors' data concerning polypropylene, 1,4-trans-polybutadiene, poly(methyl methacrylate), and cellulose triacetate, and also data on calculations of spectra for different conformations of poly(vinyl chloride), poly(vinyl bromide), and poly(ethylene terephthalate).
    Additional Material: 4 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 71 (1964), S. 198-203 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 2 (1964), S. 1-8 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The results of electrophoresis experiments on aqueous solutions of native and thermally denatured DNA are reported. A significant decrease of the electrophoretic mobility has been observed following thermal denaturation, which under suitable conditions gives rise to a resolution into two peaks of 1 : 1 mixtures in the electrophoretic pattern. This result is entirely consistent with the previously reported increase of the activity coefficient of sodium counterions following thermal denaturation. The hypothesis that thermal denaturation of calf thymus DNA induces a large decrease of charge density on the macroion which has been ascribed to the population of more extended conformations of the chains in the disordered region of the molecule is therefore further confirmed.
    Additional Material: 4 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 2 (1964), S. 135-146 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple quantitative theory of inactivation of transforming DNA has been formulated. It is based on the idea that genetic recombination of the molecule of transforming DNA with the bacterial genome is possible only, from the point mutation of the gene up to the nearest hit or point of damage on the corresponding DNA molecule. Our data and the data of other authors on the kinetics of inactivation by HNO2 or U.V. light or both are consistent with these theoretical predictions. Theoretical predictions were made concerning the extent of reactivation by fusion mid annealing of damaged DNA with a diluting genetically inactive DNA. These estimates have been reasonably confirmed by our experimental results.
    Additional Material: 7 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 735-745 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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 apparatus is described for measuring the flow rate of cellulose xanthate solutions at known pressure gradients across spinning jets. It is shown that the jet hole behaves more like a capillary than an orifice in its effect on flow and that similar relationships exist for flow through spinning jet holes and a narrow pipe characterized by an equation of the form Q = Apb, where b has a value of approximately 1.5 for the high rates of shear strain found in spinning jets and 1.4 for the lower rates found in the pipe. A fundamental approach shows a similar discontinuity when comparing the relation between apparent viscosity coefficient and rate of shear strain, between low and high rates of shear. Experimental results are given for the effect of certain chemical factors in viscose solutions and the effect of spinning jet hole size, on the flow rate/pressure gradient curve.
    Additional Material: 9 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 300-305 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Atmospheric corrosion of coated steelIn the first section reactions between steel and base-coat are interpreted as starting the corrosion. On the metal surface it is a matter of electrolytic reactions between anodic and cathodic parts, as well as chemical reactions caused by foreign substances on and in the surface. In the coating-film the decisive role is played by the permeability of atmospheric substances.The second section deals with fundamental corrosion reactions beneath the coating. Three stages of corrosion process are distinguished, beginning with the formation of ferro-ions and ending with the precipitation of ferric oxides. The water permeability of the primers is responsible for initiating the first stage.In the third section the most important means of inhibiting the corrosion process are discussed; among them are the choice of the optimal film-forming matter, the correct pigmentation (qualitatively and quantitatively), and, finally, the incorporation of effective inhibitors in the film.
    Notes: Im ersten Teil werden Reaktionen in der Grenzfläche zwischen Stahl und Anstrichfilm dargelegt, die den Rostprozeß in Gang setzen. Auf der Metallseite handelt es sich um elektrolytische Vorgänge zwischen anodischen und kathodischen Bereichen sowie chemische Reaktionen an verunreinigenden Fremdkörpern auf und in der Eisenoberfläche. Auf der Filmseite spielt die Durchlässigkeit für atmosphärische Bestandteile die entscheidende Rolle.Der zweite Teil beschäftigt sich mit den grundlegenden Unterrostungsreaktionen beim gestrichenen Stahl. Drei Stufen des Rostprozesses werden unterstrichen, die mit der Bildung von Ferro-Ionen beginnen und mit der Ausfällung von Eisenoxyden enden. Die Permeabilität der Grundierungen für Wasser setzt die erste Stufe in Gang.Im dritten Teil sind die wichtigsten Eingriffsmöglichkeiten für die Hemmung des Rostvorganges zur Diskussion gestellt. Hierzu gehören die Wahl des optimalen Filmbildners für den gegebenen Fall, die korrekte Pigmentierung (qualitativ wie quantitativ) und der Einbau wirksamer Hemmstoffe in den Film.
    Additional Material: 3 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 972-973 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 1 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2825-2833 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: A series of styrene-acenaphthylene copolymers was prepared by thermal polymerization. Homogeneous samples were obtained except for those compositions where the initial concentration of styrene monomer was 40-60 mole-%. Master curves and characteristic viscoelastic parameters were obtained for the homogeneous copolymers. The plot of Tg vs. copolymer composition yielded a linear relationship.
    Additional Material: 5 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 307-324 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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 reaction of industrially available “prepolymers,” containing one or several isocyanate groups per chain, with tert-butyl hydroperoxide yielded long-chain peroxycarbamates. These were found able to initiate the polymerization of a wide variety of vinyl monomers as well as dienes leading to a new class of block polymers of very interesting physical properties. Polyether and polyester “prepolymers” with one, two, or three isocyanate functionalities were linked chemically to polystyrene, polymethyl methacrylate, poly-n-butyl acrylate, polyarylonitrile, and polyisoprene. The formation of block polymers was proved by both physical and chemical methods. Their mechanical properties were illustrated by means of torsional modulus-temperature curves. The effect of varying composition and of a crosslinking agent on the elastic modulus was examined. Tentative reaction mechanisms were also presented.
    Additional Material: 10 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 385-398 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: After a survey of suggested analytical methods, data are given for ten polymer samples (high and low pressure polyethylenes, atactic and isotactic polypropylenes, and of natural rubbers). It appears that the suggested methods of plotting the stress relaxation data after cessation of steady flow, as well as the quantities defined from such analysis, in the case of the given polymers can yield qualitative and semiquantitative information on such structural features such as average chain length, polydispersity, chain regularity, long branching, and crosslinking.
    Additional Material: 7 Ill.
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