EFFECT OF PHYSICAL AGING ON ENTHALPY RELAXATION AND ISOTHERMAL CONTRACTION IN BISPHENOL-A POLYCARBONATE

被引：25

作者：

WASHER, M ^{[1
]}

机构：

[1] UNIV LIBRE BRUXELLES,B-1050 BRUSSELS,BELGIUM

来源：

POLYMER | 1985年 / 26卷 / 10期

关键词：

AGING OF MATERIALS - Thermodynamics - THERMODYNAMICS - Mathematical Models;

D O I：

10.1016/0032-3861(85)90091-6

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 intention of this paper is to correlate the decrease of free volume and the enthalpy relaxation which occur in high polymers during annealing. We used a simple correlation relation, with one chief parameter (the 'equilibrium temperature'), which can be deduced from different models. Data on polycarbonate (PC) show no correlation between enthalpy relaxation and isothermal contraction using that relation: the assumption that the decrease of free volume in PC in the glassy state obeys a Williams-Landel-Ferry (WLF) type equation could not be confirmed. Moreover, it seems that the changes of configuration occurring during annealing cannot be described with only one parameter.

引用

页码：1546 / 1548

页数：3

共 10 条

[1] ANNEALING OF POLYCARBONATE BELOW THE GLASS-TRANSITION - QUANTITATIVE INTERPRETATION OF THE EFFECT ON YIELD STRESS AND DIFFERENTIAL SCANNING CALORIMETRY MEASUREMENTS [J].