POLYMER SELF-DIFFUSION MEASUREMENTS BY SMALL-ANGLE NEUTRON-SCATTERING

被引：3
|
作者：
CRIST, B
机构：
[1] Department of Materials Science and Engineering, Northwestern University, Evanston
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 1991年 / 131卷
关键词：
D O I：
10.1016/0022-3093(91)90672-S
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 time dependence of small-angle neutron scattering is used to follow the interdiffusion of conventional and labeled polymers to obtain the self-diffusion coefficient, D, of chains in the melt. A number of experimental procedures and applications are reviewed. The most comprehensive results have been obtained for linear and three-arm star polymers of hydrogenated polybutadiene (HPB) and deuterated polybutadiene (DPB). The dependence of D on molecular weight, the effect of matrix dynamics on D, and the relation of D to zero shear viscosity are discussed in terms of the tube model for dynamics of entangled polymer chains.
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页码：709 / 714
页数：6
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