Distributed relaxations in PVC/PEMA polymer blends as revealed by thermostimulated depolarization current

被引：26

作者：

Ahmed, MT ^{[1
]}

Fahmy, T ^{[1
]}

机构：

[1] Mansoura Univ, Fac Sci, Dept Phys, Polymer Lab, Mansoura, Egypt

来源：

POLYMER TESTING | 1999年 / 18卷 / 08期

关键词：

D O I：

10.1016/S0142-9418(98)00057-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermally stimulated depolarization current (TSDC) was used to investigate the relaxation in amorphous polymers including poly(vinyl chloride) (PVC) and poly(ethyl methacrylate) (PEMA) and its polyblend over a temperature range that covers the a-relaxation. Analysis of TSDC behavior revealed that PVC and PEMA are characterized with a broad peak located at the temperature maximum, T-m = 355 and 347 K, respectively. These peaks were positioned in the vicinity of the glass-transition temperature of each polymer, which are attributed to dipole-dipole interaction. Moreover, thermal sampling technique (TS) was used to resolve the complex TSDC behavior of all samples to obtain its elementary peaks characterized by a single relaxation time. The peak parameters characterizing the TS peaks have been estimated by using the iterative method. In addition, around each relaxation, compensation phenomena have been observed. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：589 / 599

页数：11

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