Physical aging in amorphous polymers: comparison of observations in calorimetric and mechanical tests

被引：6

作者：

Drozdov, AD ^{[1
]}

机构：

[1] Inst Ind Math, IL-84311 Beer Sheva, Israel

来源：

EUROPEAN POLYMER JOURNAL | 2001年 / 37卷 / 07期

关键词：

amorphous polymers; physical aging; dynamic tests; calorimetric tests; aggregation-fragmentation concept;

D O I：

10.1016/S0014-3057(00)00224-X

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Constitutive equations are derived for the kinetics of physical aging in polymeric glasses. An amorphous polymer is treated as an ensemble of cooperatively rearranging regions (CRR) which relax at random times as they are thermally agitated. Structural recovery is modeled as fragmentation and aggregation of CRRs. To verify the governing equations, results of numerical simulation are compared with experimental data in calorimetric and dynamic tensile tests for three commercial grades of poly(ether imide). Fair agreement is demonstrated between observations and predictions of the model. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1379 / 1389

页数：11

共 38 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].