POLYDISPERSITY EFFECTS ON THE MICROPHASE-SEPARATION TRANSITION IN BLOCK COPOLYMERS

被引：112
|
作者：
BURGER, C
RULAND, W
SEMENOV, AN
机构：
[1] UNIV MARBURG,FACHBEREICH PHYS CHEM,W-3550 MARBURG,GERMANY
[2] MV LOMONOSOV MOSCOW STATE UNIV,DEPT PHYS,MOSCOW 119899,USSR
来源：
MACROMOLECULES | 1990年 / 23卷 / 13期
关键词：
D O I：
10.1021/ma00215a021
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 influence of polydispersity on the transitions occurring in the weak segregation regime and on the scattering functions of the disordered phase in diblock copolymers is studied for one-component and multicomponent systems including mixtures with homopolymers. Application of the fluctuation corrections given by Fredrickson and Helfand9 leads to the determination of the transition windows as a function of degree of polymerization N, polydispersity U, and composition f. The applicability of the fluctuation corrections appears to be extended to lower N and f with increasing U. The prediction of transitions is facilitated by the concept of a reduced phase diagram. © 1990, American Chemical Society. All rights reserved.
引用
收藏
页码：3339 / 3346
页数：8
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