Journal article
Hierarchical assembly of a series of rod-coil block copolymers: supramolecular LC phase in nanoenviroment
Bulletin of the American Physical Society, Vol.49(1)
01 Mar 2004
Abstract
A series of narrowly distributed rod-coil diblock copolymers, poly(styrene-block-(2,5-bis[4-methoxyphenyl]oxycarbonyl)styrene) (PS-PMPCS) were synthesized by 2,2,6,6-tetramethyl-1-piperidinyloxy- (TEMPO-) mediated living free radical polymerization. The block copolymers microphase separate into ordered structures at temperatures below ca. 240 degree C. PMPCS segments form supramolecular columnar nematic phase within the microphase separated block copolymers. The LC orientation within the confined block copolymer environment has been studied using wide angle X-ray diffraction while block copolymer microphase structures have been monitored by small angle X-ray scattering technique. LC columnar axes have been identified to be parallel to the block copolymer lamellar normal. The hierarchical structure also resembles the 'bilayer smectic A' phase observed in small molecular liquid crystals and rod-coil oligomers.
Metrics
1 Record Views
Details
- Title
- Hierarchical assembly of a series of rod-coil block copolymers: supramolecular LC phase in nanoenviroment
- Creators
- Christopher LiKishore TennetiLingyu LiDong ZhangHailiang ZhangXinhua WanQi-Feng Zhou
- Publication Details
- Bulletin of the American Physical Society, Vol.49(1)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991019196671604721