Effect of stress on the free volume content of poly(chlorotrifluoroethylene)

被引：8
|
作者：
Ramachandra, P
Ramani, R
Ramgopal, G
Ranganathaiah, C [1 ]
Murthy, NS
机构：
[1] Univ Mysore, Dept Studies Phys, Mysore 570006, Karnataka, India
[2] Allied Signal Inc, Morristown, NJ 07962 USA
来源：
POLYMER | 1998年 / 39卷 / 13期
关键词：
poly(chlorotrifluoroethylene); free volume; compression;
D O I：
10.1016/S0032-3861(97)00622-8
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 effect of stress (hydrostatic compression) on the free volume of poly(chlorotrifluoroethylene) has been investigated using the positron annihilation lifetime (PAL) technique in the pressure range of 0-14 kbar at room temperature. The variation of the annihilation parameters indicates that the free volume compression occurs at a higher pressure (>8 kbar) compared to molecular compression (4 kbar). The measured free volume size decreases from 95 to 73 Angstrom(3) under the influence of compression. The results also indicate a crystalline-amorphous transformation. The free volume compressibility (beta(f)) is found to be maximum around 9 kbar (10(-3) atm(-1)). (C) 1998 Elsevier Science Ltd. All rights reserved.
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页码：2987 / 2990
页数：4
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