Effect of molecular weight on the breaking time of a glassy polymer

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Abstract

An analysis of the dependence of the breaking time tb of a glassy polymer under constant stress on the molecular weight of the polymer is made with the use of the theories by Bueche and by Cohen and Turnbull. It is concluded that log tb is proportional to the degree of polymerization x when x is small but becomes independent of x at large values of x.

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