Temperature dependence of dynamic yield stress in amorphous polymers as indicator for the dynamic glass transition at negative pressure

被引：10
|
作者：
Lach, R
Grellmann, W
Schröter, K
Donth, E [1 ]
机构：
[1] Univ Halle Wittenberg, Fachbereich Phys, D-06099 Halle, Saale, Germany
[2] Univ Halle Wittenberg, Fachbereich Werkstoffwissensch, D-06099 Halle, Saale, Germany
来源：
POLYMER | 1999年 / 40卷 / 06期
关键词：
glass transition; pressure dependence; dynamic yield stress;
D O I：
10.1016/S0032-3861(98)00365-6
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The dynamic yield stress for polycarbonate, polystyrene and poly(methyl methacrylate) was measured by an instrumented Charpy impact tester in a wide temperature range. The dynamic yield stress is interpreted as being proportional to a negative pressure. The temperature dependence can be described by a Williams-Landel-Ferry type of equation. The extrapolation to ambient pressure leads to the main or transition and is used to connect the dynamic yield stress to the pressure dependence of the ct dispersion zone. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1481 / 1485
页数：5
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