MICROPHASES OF NEMATIC DIBLOCK COPOLYMERS - REENTRY AND FINITE-SIZE EFFECTS

被引：30

作者：

WILLIAMS, DRM ^{[1
]}

HALPERIN, A ^{[1
]}

机构：

[1] CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.71.1557

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study microphase separation in melts of diblock copolymers consisting of a main chain liquid crystalline block and an isotropic block. In the nematic phase the nematic block is easily stretched due to the presence of hairpins. This effect dominates splay and thus favors spherical micelles and cylinders with nematic cores. The phase diagram is thus qualitatively different from that of an isotropic diblock and shows multiply reentrant sequences. The mesophases of nematic-isotropic diblocks afford opportunities for studying finite size effects on the nematic transition.

引用

页码：1557 / 1560

页数：4

共 26 条

[1]

[Anonymous], 1979, MONTE CARLO METHODS

[2]

[Anonymous], 1979, SCALING CONCEPTS POL

[3]

ASHCROFT NW, 1981, SOLID STATE PHYSICS

[4] BLOCK COPOLYMER THERMODYNAMICS - THEORY AND EXPERIMENT [J].

BATES, FS ;

FREDRICKSON, GH .

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1990, 41 (01) :525-557

[5]

Binder K., 1992, MONTE CARLO METHODS

[6] THEORY OF POLYMER GELS WITH LIQUID-CRYSTAL SOLVENTS [J].

BROCHARD, F .

JOURNAL DE PHYSIQUE, 1979, 40 (11) :1049-1054

[7]

Ciferri A., 1982, POLYM LIQUID CRYSTAL

[8] NON-SINGULAR DISCLINATIONS OF STRENGTH S = + 1 IN NEMATICS [J].

CLADIS, PE ;

KLEMAN, M .

JOURNAL DE PHYSIQUE, 1972, 33 (5-6) :591-&

[9]

de Gennes P. G., 1982, POLYM LIQUID CRYSTAL

[10] NEMATIC SMECTIC-A PHASE-TRANSITION IN ULTRATHIN FILMS OF POLYMERIC LIQUID-CRYSTAL STUDIED BY X-RAY REFLECTIVITY [J].

ENTIN, I ;

GOFFER, R ;

DAVIDOV, D ;

HERSHT, I .

PHYSICAL REVIEW B, 1993, 47 (13) :8265-8268

← 1 2 3 →