THEORY OF NEMATIC ORDERING IN POLYDISPERSE THERMOTROPIC MAIN-CHAIN POLYMERS

被引：10
|
作者：
SEMENOV, AN
机构：
[1] Physics Department, Moscow State University, Moscow
来源：
EUROPHYSICS LETTERS | 1993年 / 21卷 / 01期
关键词：
D O I：
10.1209/0295-5075/21/1/007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Nematic phase transition in thermotropic semi-flexible polymers is considered. A general theory for polydispersity effects in the system is proposed. It is shown that nematic transition occurs in a finite-temperature gap, deltaT, where the system separates into lower-(isotropic) and higher-molecular-weight (anisotropic) phases. The width of the gap depends on the polydispersity index, delta; for a given delta, it is inverse proportional to the average degree of polymerization.
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页码：37 / 42
页数：6
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