CONTRIBUTION OF A DIFFUSIONAL MECHANISM TO THE RELAXATION OF FREE VOLUME IN AMORPHOUS POLYMERS.

被引：0
|
作者：
Bogdanova, L.M. [1 ]
Irzhak, V.I. [1 ]
Rozenberg, B.A. [1 ]
机构：
[1] USSR Acad of Sciences, USSR, USSR Acad of Sciences, USSR
来源：
Polymer science USSR | 1987年 / 28卷 / 07期
关键词：
DIFFUSION - RELAXATION PROCESSES;
D O I：
10.1016/0032-3950(86)90344-8
中图分类号：
学科分类号：
摘要：
The ratio of local and diffusional mechanism of relaxation of excess free volume in amorphous polymers is discussed. On the basis of ideas on the finite lifetime of holes, a model is formulated for the relaxation of volume in accordance with a diffusional mechanism. The diffusion mechanism can be important for the volume relaxation of specimens of linear dimensions of the same order as the (D tau )**0**. **5 value, where tau is the lifetime of a hole, and D is the effective diffusion coefficient, i. e. the contribution of the diffusional mechanism to the mechanism of relaxation depends on the specimen size.
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页码：1690 / 1697
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