Self-assembled smectic phases in rod-coil block copolymers

被引：412
作者：
Chen, JT
Thomas, EL
Ober, CK
Mao, GP
机构：
[1] MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139
[2] CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853
来源：
SCIENCE | 1996年 / 273卷 / 5273期
关键词：
D O I：
10.1126/science.273.5273.343
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Rod-coil block copolymers are self-assembling polymers that combine the physics of orientational ordering of rodlike polymers and the microphase separation of coil-coil block copolymers. Several new solid-state morphologies were observed in a series of anionically synthesized model poly(hexyl isocyanate-b-styrene) rod-coil diblock copolymers examined by transmission electron microscopy and selected-area electron diffraction. The rod-coils formed smectic C-like and O-like morphologies with domain sizes ranging from tens of nanometers to almost 1 micrometer, Both structural and orientational changes were found for increasing rod volume fractions. In addition, some morphologies exhibited spontaneous long-range orientational order over many tens of micrometers.
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页码：343 / 346
页数：4
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