Studies on the free volume and the volume expansion behavior of amorphous polymers

被引：65
|
作者：
Hagiwara, K
Ougizawa, T [1 ]
Inoue, T
Hirata, K
Kobayashi, Y
机构：
[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan
[2] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2000年 / 58卷 / 5-6期
关键词：
free volume; volume expansion; amorphous polymer; positron annihilation lifetime spectroscopy;
D O I：
10.1016/S0969-806X(00)00211-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to estimate the free volume contribution on the volume change, we investigated the relationship between the volume expansion behavior by Pressure-Volume-Temperature measurement apparatus and the free volume behavior by Positron Annihilation Lifetime Spectroscopy for some amorphous polymers. From these results, the free volume fraction of the amorphous polymers was calculated by assuming that the core volume increases at a constant rate with temperature. It was found that the amount of free volume was not constant even in the glassy state and it played a very important role in the volume expansion. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：525 / 530
页数：6
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