標題: | Supramolecular structures of an amphiphilic hairy-rod conjugated copolymer bearing poly(ethylene oxide) side chain |
作者: | Liao, Shao-Ching Lai, Chia-Sheng Yeh, Di-Di Rahman, M. Habibur Hsu, Chain-Shu Chen, Hsin-Lung Chen, Show-An 應用化學系 Department of Applied Chemistry |
關鍵字: | Amphiphilic hairy-rod copolymer;Conjugated polymer;Supramolecular structure;SAXS;Micelle |
公開日期: | 1-七月-2009 |
摘要: | The structures of an amphiphilic conjugated graft copolymer, poly(2,3-diphenyl-5-(trimethylene-heptadeca(oxyethylene)-methoxy-phenylene vinylene) (denoted as PVEO(17)) composing of a conjugated DP-PPV backbone and PEO side chains, in bulk and solutions with tetrahydrofuran (THF) and water have been investigated by small-angle X-ray scattering (SAXS). In bulk state, the DP-PPV main chains in PVEO(17) stacked to form flat disk microdomains dispersed in the PEO side-chain matrix. The corresponding wide angle X-ray scattering pattern revealed the existence of crystallinity of the PEO side chains. The structure of the polymer in solution was affected by the solvent quality and the polymer concentration. PVEO(17) chains were relatively well dispersed in THF. In aqueous solutions, however, the amphiphilic PVEO(17) chains aggregated significantly over the concentration range of 1-8 wt%, where the polymer was found to self-organize to form cylindrical micelles with the aggregation number increasing with the increase of concentration. The photophysical properties characterized by UV-Vis and photoluminescence spectroscopy were strongly affected by the aggregation state of the polymer. (C) 2009 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.reactfunctpolym.2009.03.007 http://hdl.handle.net/11536/7003 |
ISSN: | 1381-5148 |
DOI: | 10.1016/j.reactfunctpolym.2009.03.007 |
期刊: | REACTIVE & FUNCTIONAL POLYMERS |
Volume: | 69 |
Issue: | 7 |
起始頁: | 498 |
結束頁: | 506 |
顯示於類別: | 期刊論文 |