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The Physics of Deformation and Fracture of Polymers by Ali Argon

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8 Plasticity of glassy polymers

8.1 Overview

The mechanistic understanding of the plastic response of glassy polymers in the wide temperature range between 0 K and the glass-transition temperature went through a complex history of evolution of concepts and searching experimentation. The complexity of the amorphous structure of most glassy polymers with hardly any recognizable medium-to-long-range order and the usual brittle behavior in the deep glassy range but rapidly improving deformability near the glass-transition temperature led to propositions that plastic deformation necessitates either melting and solidification during the flow process or at least a stress-induced glass transition (Müller 1952). The fact that glassy polymers could ...

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