Hierarchical Self-Assembled Structures from POSS-Containing Block Copolymers Synthesized by Living Anionic Polymerization

被引：149

作者：

Hirai, Tomoyasu ^{[1
]}

Leolukman, Melvina ^{[4
]}

Jin, Sangwoo ^{[2
,3
]}

Goseki, Raita ^{[1
]}

Ishida, Yoshihito ^{[1
]}

Kakimoto, Masa-aki ^{[1
]}

Hayakawa, Teruaki ^{[1
]}

Ree, Moonhor ^{[2
,3
]}

Gopalan, Padma ^{[4
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

[2] Pohang Univ Sci & Technol, Dept Chem, Natl Res Lab Polymer Synth & Phys,BK Sch Mol Sci, Pohang Accelerator Lab,Ctr Electrophoto Behav Adv, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol, Div Adv Mat Sci, Pohang 790784, South Korea

[4] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

来源：

MACROMOLECULES | 2009年 / 42卷 / 22期

基金：

美国国家科学基金会;

关键词：

X-RAY-SCATTERING; THIN-FILMS; LITHOGRAPHY; NANOSTRUCTURES; POLYSTYRENE; ORIENTATION; TEMPLATES; ARRAYS;

D O I：

10.1021/ma9018944

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two kinds of polyhedral oligomeric silsesquioxane (POSS)-containing block copolymers (BCPs), namely PS-b-PMAPOSS and PMMA-b-PMAPOSS, were synthesized by living anionic polymerization. A wide range of molecular weights were obtained with a very narrow polydispersity index of less than 1.09. The bulk samples prepared by slow evaporation from a polymer solution in chloroform exhibit well-defined microphase-separated structures with long-range order. Thermal annealing induced hierarchical structures consisting of a smaller length scale ordered crystalline POSS domains within the larger microphase-separated structures. We report detailed structural characterization of these hierarchical structures in bulk and thin films by transmission electron microscopy and grazing incidence wide-angle X-ray scattering (GIWAXS). On the basis of this structural analysis, we propose a model for the formation of an orthorhombic lattice structure through the aggregation of POSS segments which formed a helix-like structure.

引用

页码：8835 / 8843

页数：9

共 34 条

[1] Synthesis and characterization of silicon-containing block copolymers from nitroxide-mediated living free radical polymerization [J].