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  • 1980-1984  (1)
  • 1975-1979
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 32 (1981), S. 471-475 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Based on a phenomenological thermokinetic fluctuation theory of glass transition an approach to describing the freezing in process and the relaxationeffects combined with linear reactions is presented. By evaluating the thermograms \documentclass{article}\pagestyle{empty}\begin{document}$ (\dot Q(T)) $\end{document} the determination of the parameters required is discussed, which indicate the extent of cooperative motions in glass transition process. With four different polymers (PS, PVC, PMMA, PVAC) the extent of the cooperatively rearranging regions are determined, corresponding to correlation lengths of 0.8 to 2.4 nm.
    Notes: In Anlehnung an eine phänomenologische thermokinetische Fluktuationstheorie des Glasübergans wird ein Ansatz zur Beschreibung des Einfriervorgangs und von Nachwirkungserscheinungen im Rahmen der linearen Reaktion vorgestellt. Anhand der Auswertung von Thermogrammen \documentclass{article}\pagestyle{empty}\begin{document}$ (\dot Q(T)) $\end{document} wird die Bestimmung der notwendigen Parameter diskutiert. Diese geben Auskunft über den Umfang der kooperativen Bewegung beim Einfriervorgang. für vier verschiedene Polymere (PS, PVC, PMMA, PVAC) werden die Größen für die kooperativen Umlagerungsbereiche angegeben, die Korrelationslängen von 0,8 bis 2,4 nm entsprechen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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