Abstract

Based on macroscopic and microscopic observations, a model is proposed concerning molecular conformation and chemical structure changes occurring during mechanical deformation of amorphous polymers below their Tg. It is assumed that a bulk polymer, with high molecular mass, consists of interpenetrating, coiled chain molecules. The intrinsic flexibility and the thickness of chain molecules depend on their chemical nature. Stresses are transferred from one chain to others by physical entanglements.

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