3D nanometer-scale study of coexisting bicontinuous morphologies in a block copolymer/homopolymer blend

被引：42

作者：

Jinnai, Hiroshi

Hasegawa, Hirokazu ^{[1
]}

Nishikawa, Yukihiro

Sevink, G. J. Agur

Braunfeld, Michael B.

Agard, David A.

Spontak, Richard J.

机构：

[1] Kyoto Univ, Dept Polymer Chem, Kyoto 6068501, Japan

[2] Kyoto Inst Technol, Dept Polymer Sci & Engn, Kyoto 6068585, Japan

[3] Leiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

[4] Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94143 USA

[5] Univ Calif San Francisco, Howard Hughes Med Inst, San Francisco, CA 94143 USA

[6] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA

[7] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 17期

关键词：

bicontinuous networks; block copolymers; phase separation; simulations; TEM;

D O I：

10.1002/marc.200600344

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Coexisting bicontinuous morphologies, one ordered and one disordered, are investigated in a macrophase-separated poly(styrene-block-isoprene) diblock copolymer/ homopolystyrene (SI/hS) blend. Two-phase behavior is attributed to the relatively high hS/S mass ratio (0.92). According to its crystallographic signature and channel coordination as discerned from three-dimensional (3D) images generated by transmission electron microtomography (TEMT), the ordered morphology is classified as gyroid. The 3D local and global topological characteristics of both bicontinuous morphologies as measured directly from TEMT images are reported. The disordered morphology is further compared with molecular-field simulations to ascertain the spatial distribution of the constituent species within the blend, thereby demonstrating the utility of high-resolution 3D imaging coupled with molecular-level simulations.

引用

页码：1424 / 1429

页数：6

共 40 条

[1]

ABETZ V, 2006, MACROMOLECULAR ENG P, V3, pCH9

[2] Polymeric bicontinuous microemulsions [J].