Abstract
Elongation of glassy PETP in an adsorption-active medium was examined from the point of view of the Griffith-Rebinder theory. It was shown theoretically that the number of microcracks formed shows a complex dependence on thickness and the rate of stressing a polymer sample. The equation derived was verified experimentally and satisfactory agreement was found between theory and experiment. The distribution of micro-heterogeneities in an actual polymer was described on the basis of data obtained; it was found that this distribution determined inelastic deformation.
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