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The Physics of Deformation and Fracture of Polymers by Ali Argon

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9 Plasticity of semi-crystalline polymers

9.1 Overview

Semi-crystalline polymers combine both crystalline components composed of chain-folded lamellae and closely linked amorphous components of molecular segments between lamellae, often linking neighboring lamellae. We consider here primarily high-density polyethylene (HDPE) as the generic and most widely studied semi-crystalline polymer, in which the crystalline component has an orthorhombic crystal structure that plastically deforms by crystallographic slip, mainly on the (100) planes in the [001] chain direction by chain slip, when its threshold plastic-shear resistance is overcome. The amorphous component exists in a state whose behavior closely resembles that of a confined rubber, having ...

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