MICROPHASE SEPARATION OF ABC-TYPE TRIBLOCK COPOLYMERS

被引：122

作者：

NAKAZAWA, H ^{[1
]}

OHTA, T ^{[1
]}

机构：

[1] OCHANOMIZU UNIV,DEPT PHYS,TOKYO 112,JAPAN

来源：

MACROMOLECULES | 1993年 / 26卷 / 20期

关键词：

D O I：

10.1021/ma00072a031

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We have studied microphase separation of ABC-type triblock copolymers in the strong segregation limit by generalizing our previous theory for diblock copolymers. The free energy functional in terms of local monomer concentrations is derived via a mean field approximation and a local approximation for higher order coupling. In the special case where the monomer number of the A block is the same as that of the C block, we calculate the critical values of the volume fraction for morphological transitions of ordered domains from lamellar to cylinder and from cylinder to sphere. It is emphasized that in the ABC-tpye copolymer, a square lattice is predicted to be more stable than a hexagonal one for cylindrical domains. The possibility of an ordered tricontinuous diamond structure is also examined. The results are compared with the recent experiments by Matsushita et al.

引用

页码：5503 / 5511

页数：9

共 20 条

[1] MICRODOMAIN MORPHOLOGY OF STAR COPOLYMERS IN THE STRONG-SEGREGATION LIMIT [J].