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  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Examination of kinetics of thermal decomposition of peroxides of polymethyl methacrylate (1962)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 58 (1962), S. 839-842 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The kinetics of thermal decomposition of the peroxides obtained by γ-irradiation of polymethyl methacrylate in air was investigated. The method of examination of the velocity of this reaction based on the reaction of DPPH with free radicals. The measurements resulted in finding the reaction to be of the first order. The rate constants for the thermal decomposition of the peroxides at temperatures of 70, 80, 90, and 100°C. were determined. The constants for the Arrhenius formula were determined and the relationship k = 3.61 × 105e-8e-15,000/RT was found.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1962.1205816652
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  • 2
    Electronic Resource
    Electronic Resource
    Examination of kinetics of graft copolymerization on preirradiated polymethyl methacrylate (1963)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 1 (1963), S. 2085-2092 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The kinetics of graft copolymerization of vinyl acetate on polymethyl methacrylate has been investigated. Polymethyl methacrylate was preirradiated in the presence of air by γ-rays, the polymer being used as the initiator of the polymerization in the one-phase system. The rate of reaction for low conversion is proportional to the concentration of monomer raised to the power of 3/2 and to the concentration of initiator to the 1/2 power. The reaction satisfied the kinetic equation for ordinary addition polymerization if the decrease of the amount of the initiator during the process is taken into consideration. The activation energy of this process has been found. The quantity of the homopolymers produced in this reaction is negligible and need not be taken into account in rough calculations as far as kinetics are concerned.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1963.100010626
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    Paper (German National Licenses)
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