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TRACER DIFFUSION OF LINEAR AND STAR POLYMERS IN ENTANGLED SOLUTIONS AND GELS

被引：25
作者：
LODGE, TP
ROTSTEIN, NA
机构：
[1] Department of Chemistry, University of Minnesota, Minneapolis
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 1991年 / 131卷
关键词：
D O I：
10.1016/0022-3093(91)90666-T
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The technique of dynamic light scattering from isorefractive tenary solutions was used to examine the tracer diffusion of linear and star polystyrenes in poly(vinylmethylether) solutions, and of linear polystyrenes in poly(vinylmethylether) gels. A hydrodynamic scaling model is unable to provide an adequate description of the relative solution mobilities of star and linear polymers of equal total molecular weight. In a gel with concentration equal to 0.235 g/cm3, it was found that the tracer diffusivity scales as M-2.9 for linear polymers, where M is the molecular weight, by contrast with the reptation prediction of M-2.
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页码：671 / 675
页数：5
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