ISOTROPIC LIFSHITZ BEHAVIOR IN BLOCK COPOLYMER-HOMOPOLYMER BLENDS

被引：110

作者：

BATES, FS ^{[1
]}

MAURER, W ^{[1
]}

LODGE, TP ^{[1
]}

SCHULZ, MF ^{[1
]}

MATSEN, MW ^{[1
]}

ALMDAL, K ^{[1
]}

MORTENSEN, K ^{[1
]}

机构：

[1] RISO NATL LAB,DK-4000 ROSKILDE,DENMARK

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.75.4429

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A series of mixtures composed of a symmetric A-B diblock copolymer and a symmetric blend of A and B homopolymers was investigated by small-angle neutron scattering. Mean-field theory predicts that a line of lamellar-disorder transitions with wave-vector instability q* > 0 will meet a line of critical points with q* = 0 in the three-component mixture at an isotropic Lifshitz point. Mean-field Lifshitz behavior (gamma = 1 and nu = 1/4) was observed in the disordered state at the anticipated composition to within 1 K of the phase transition.

引用

页码：4429 / 4432

页数：4

共 23 条

[1]

[Anonymous], 1992, PHASE TRANSITIONS CR

[2] FLUCTUATION-INDUCED 1ST-ORDER TRANSITION OF AN ISOTROPIC SYSTEM TO A PERIODIC STATE [J].

BATES, FS ;

ROSEDALE, JH ;

FREDRICKSON, GH ;

GLINKA, CJ .

PHYSICAL REVIEW LETTERS, 1988, 61 (19) :2229-2232

[3] SPECIFIC-HEAT EXPONENT AND CRITICAL-AMPLITUDE RATIO AT THE LIFSHITZ MULTICRITICAL POINT [J].

BINDILATTI, V ;

BECERRA, CC ;

OLIVEIRA, NF .

PHYSICAL REVIEW B, 1989, 40 (13) :9412-9415

[4]

Brazovskii S.A, 1975, SOV PHYS JETP, V41, P85, DOI [10.1142/9789814317344_0016, DOI 10.1142/9789814317344_0016]

[5] PHASE-EQUILIBRIA IN COPOLYMER HOMOPOLYMER TERNARY BLENDS - MOLECULAR-WEIGHT EFFECTS [J].

BROSETA, D ;

FREDRICKSON, GH .

JOURNAL OF CHEMICAL PHYSICS, 1990, 93 (04) :2927-2938

[6] LANDAU-GINZBURG MEAN-FIELD THEORY FOR NEMATIC TO SMECTIC-C AND NEMATIC TO SMECTIC-A PHASE-TRANSITIONS [J].

CHEN, JH ;

LUBENSKY, TC .

PHYSICAL REVIEW A, 1976, 14 (03) :1202-1207

[7] MICRO-EMULSIONS AND THE FLEXIBILITY OF OIL-WATER INTERFACES [J].

DEGENNES, PG ;

TAUPIN, C .

JOURNAL OF PHYSICAL CHEMISTRY, 1982, 86 (13) :2294-2304

[8] FLUCTUATION EFFECTS IN THE THEORY OF MICROPHASE SEPARATION IN BLOCK COPOLYMERS [J].

FREDRICKSON, GH ;

HELFAND, E .

JOURNAL OF CHEMICAL PHYSICS, 1987, 87 (01) :697-705

[9] MOLECULAR-WEIGHT SCALING IN CRITICAL POLYMER MIXTURES [J].

GEHLSEN, MD ;

ROSEDALE, JH ;

BATES, FS ;

WIGNALL, GD ;

HANSEN, L ;

ALMDAL, K .

PHYSICAL REVIEW LETTERS, 1992, 68 (16) :2452-2455

[10] INTERFACIAL PROPERTIES OF AMPHIPHILIC SYSTEMS - THE APPROACH TO LIFSHITZ POINTS [J].

GOMPPER, G ;

HOLYST, R ;

SCHICK, M .

PHYSICAL REVIEW A, 1991, 43 (06) :3157-3160

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