The glass transition temperature of polystyrene - Results of a round robin test

被引：219
|
作者：
Rieger, J
机构：
[1] Polymer Research Division, BASF AG
来源：
JOURNAL OF THERMAL ANALYSIS | 1996年 / 46卷 / 3-4期
关键词：
glass transition temperature; polystyrene;
D O I：
10.1007/BF01983614
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A round robin test was performed to determine the reliability of values for the glass transition temperature T-g as determined by DTA on polymers. Ten different instruments were involved. The test material was high molecular weight polystyrene. Values for T, (midpoint) were reported in the range 107 degrees C+/-2 K. The respective heat flow curves differed considerably in shape. In the literature a T-g of 100 degrees C is often given for polystyrene. The discrepancy between this value and the value of 107 degrees C found in the round robin test is due to three differences: the thermal history of the sample, the evaluation of the heat flow curves, and the effect of finite sample size.
引用
收藏
页码：965 / 972
页数：8
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