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  • 1960-1964  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Viscoelastic properties of plasticized polymers (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 393-397 
    Details
    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: Stress relaxation master curves were obtained for polystyrene, polymethyl methacrylate, and polyvinyl chloride, all plasticized with dioctylphthalate. The plasticized polyvinyl chloride results were quite different from the others, and this was tentatively ascribed to borderline crystallinity.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070136
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Further results concerning rubber elasticity and chain configuration (1962)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 61 (1962), S. S23 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1962.1206117135
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rubber elasticity and chain configuration (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 54 (1961), S. 175-192 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Various theories accounting for the existence of a front factor in the equation of state for rubber elasticity are reviwed. It is shown that a front factor which may be different from unity exists whether or not intramolecular energy effects are present. A unified theory is presented which is applicable both to Gaussian chains and to chains with intramolecular folding energy. Stress-temperature measurements were used to obtain values of the intramolecular folding energy ∊′ for numerous crosslinked polyacrylates and polymethacrylates. The values of ∊′ for almost all of the polyacrylates were found to be approximately zero; the values of ∊′ for the polymethacrylates varied generally between -350 and -700 cal./mole, indicating a preference for folded configurations. The front factors were also determined for these crosslinked polymers at 60°C. The front factor appears relatively independent of the degree of crosslinking. There appears to be a general trend to smaller front factors as the size of the alkyl chain increases in both series. An interpretation in terms of network interpenetration is given in the text. The variation of ∊′ with copolymer composition has been determined for a series of butyl acrylate-butyl methacrylate copolymers. The value of ∊′ for isotactic amorphous poly(1-pentene) was also measured and found to be zero. Finally, the effect of diluent on the front factor is discussed for the case where diluent is present during the crosslinking process and for the case where it is added after crosslinking.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1961.1205415913
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  • 4
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    Analytical study to extend the capabilities of the aerojet-general ablation digital computer program final report (1964)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Modified computer program mathematical theory and mathematical model description for predicting rocket engine ablative liner thickness, char depth, and temperature distribution
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA-CR-65007
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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