Abstract
The mechanical behaviour of glassy polyethyleneterephthalate (PETP) has been investigated under strain in a number of adsorption-active media (AAM). It was found that stretching curves for the polymer in AAM differ markedly for high and low strain rates. This is related to the fact that with high strain rates two types of forced elastic deformation develop in the form of necking and microcracks. It is shown that the manner in which deformation develops is determined by a scale factor for the specimen being tested, by the strain rate, and by the viscosity of the AAM that is being used.
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