Lyotropic phase morphologies of amphiphilic block copolymers

被引：91

作者：

Förster, S

Berton, B

Hentze, HP

Krämer, E

Antonietti, M

Lindner, P

机构：

[1] Univ Hamburg, Inst Chem Phys, D-20146 Hamburg, Germany

[2] Max Planck Inst Colloids & Interfaces, D-14476 Golm, Germany

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

MACROMOLECULES | 2001年 / 34卷 / 13期

关键词：

D O I：

10.1021/ma001923h

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Lyotropic phase morphologies of amphiphilic poly(butadiene-b-ethylene oxide) (PB-PEO) block copolymers are studied using transmission electron microscopy, small-angle X-ray scattering, small-angle neutron scattering, and polarized optical microscopy. The PB-PEO block copolymers form type-1 lyotropic phases comprising disordered micellar solutions (L-1), spheres arranged on a bce lattice (I-1), hexagonally packed cylinders (H-1), and lamellae (L-a). Increasing molecular weight destabilizes the I-1 and H-1 phases and lowers the degree of order. For high molecular weight block copolymers the increase in chain conformational entropy leads to the formation of the sponge phase (L-3) The transmission electron micrographs allow a detailed analysis of packing defects and epitaxial relations of the block copolymer lyotropic phases.

引用

页码：4610 / 4623

页数：14

共 76 条

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