Constitutive equations in nonlinear viscoelasticity of glassy polymers based on the concept of traps

被引：9

作者：

Drozdov, AD ^{[1
]}

机构：

[1] Inst Ind Mat, IL-84311 Beersheba, Israel

来源：

POLYMER ENGINEERING AND SCIENCE | 2000年 / 40卷 / 03期

关键词：

D O I：

10.1002/pen.11211

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Constitutive equations are derived for the nonlinear viscoelastic response of amorphous polymers. The model treats a glassy polymer as an ensemble of independent relaxing regions that randomly hop in their cages being thermally activated. Rearrangement occurs when a flow unit reaches some liquid-like state. Stress-strain relations are verified using experimental data in tensile relaxation tests for polyester resins with two types of flexibilizers. Fair agreement is demonstrated between observations and results of numerical simulation.

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页码：818 / 825

页数：8

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