Well-ordered microdomain structures in polydisperse poly(styrene)-poly(acrylic acid) diblock copolymers from controlled radical polymerization

被引：149

作者：

Bendejacq, D

Ponsinet, V ^{[1
]}

Joanicot, M

Loo, YL

机构：

[1] UMR 166 CNRS Rhodia, Complex Fluids Lab, Cranbury, NJ 08512 USA

[2] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

[3] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

[4] Univ Texas, Chem Eng Dept, Austin, TX USA

来源：

MACROMOLECULES | 2002年 / 35卷 / 17期

关键词：

D O I：

10.1021/ma020158z

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

To investigate whether diblock copolymers with substantial distributions of molecular weight and composition can self-assemble into highly regular microdomain structures, we examine the morphologies of polystyrene-b-poly(acrylic acid), diblock copolymers (PS-PAA) synthesized by controlled radical polymerization in emulsion. Despite diblock polydispersity indices of ca. 2, solvent-cast films of these diblocks, as well as their blends with PS homopolymer of low molecular weight, exhibit well-ordered lamellar or hexagonally packed cylindrical morphologies in the midrange of composition, as shown by small-angle X-ray scattering and transmission electron microscopy. In several specimens, well-ordered regions of lamellae and cylinders appear to coexist. Films of very asymmetric diblocks or blends exhibit spherical microdomains without lattice order.

引用

页码：6645 / 6649

页数：5

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