Stability of ordered phases in weakly segregated diblock copolymer systems

被引：89

作者：

Laradji, M ^{[1
]}

Shi, AC ^{[1
]}

Desai, RC ^{[1
]}

Noolandi, J ^{[1
]}

机构：

[1] XEROX RES CTR CANADA LTD,MISSISSAUGA,ON L5K 2L1,CANADA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 13期

关键词：

BLOCK-COPOLYMERS; MICRODOMAIN MORPHOLOGY; TRANSITION;

D O I：

10.1103/PhysRevLett.78.2577

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Stability of ordered phases in diblock copolymer melts is studied using a theory of anisotropic fluctuations, which bears a useful similarity with energy band theory in solids. We calculated stability lines of all ordered phases and found the hexagonally perforated lamellar phase to be unstable around the lamellar-cylindrical (LC) phase boundaries. We used fluctuation analysis to obtain dynamical pathways between ordered phases and argue that the observed modulated layered states along LC boundary regions are due to infinitely degenerate fluctuation modes of the lamellar phase.

引用

页码：2577 / 2580

页数：4

共 25 条

[21] EPITAXIAL RELATIONSHIP FOR HEXAGONAL-TO-CUBIC PHASE-TRANSITION IN A BLOCK-COPOLYMER MIXTURE [J].

SCHULZ, MF ;

BATES, FS ;

ALMDAL, K ;

MORTENSEN, K .

PHYSICAL REVIEW LETTERS, 1994, 73 (01) :86-89

[22] DOMAIN SHAPES AND PATTERNS - THE PHENOMENOLOGY OF MODULATED PHASES [J].

SEUL, M ;

ANDELMAN, D .

SCIENCE, 1995, 267 (5197) :476-483

[23] Theory of anisotropic fluctuations in ordered block copolymer phases [J].

Shi, AC ;

Noolandi, J ;

Desai, RC .

MACROMOLECULES, 1996, 29 (20) :6487-6504

[24] ORDERED BICONTINUOUS DOUBLE-DIAMOND STRUCTURE OF STAR BLOCK COPOLYMERS - A NEW EQUILIBRIUM MICRODOMAIN MORPHOLOGY [J].

THOMAS, EL ;

ALWARD, DB ;

KINNING, DJ ;

MARTIN, DC ;

HANDLIN, DL ;

FETTERS, LJ .

MACROMOLECULES, 1986, 19 (08) :2197-2202

[25] Anisotropic fluctuations in ordered copolymer phases [J].

Yeung, C ;

Shi, AC ;

Noolandi, J ;

Desai, RC .

MACROMOLECULAR THEORY AND SIMULATIONS, 1996, 5 (02) :291-298

← 1 2 3 →