标题: | Synthesis of Ferroelectric Liquid Crystalline Polyoxiranes and Polyoxetanes By Ring Opening Polymerization. |
作者: | Hsu, Chain-Shu Liau, Wei-Lung 应用化学系 Department of Applied Chemistry |
关键字: | ferroelectric liquid crystalline polymers;polyoxirane;polyoxetane |
公开日期: | 1998 |
摘要: | The synthesis of two series of liquid crystalline polyoxiranes and polyoxetanes containing 4-(4-hydroxybiphenyl-4'-carbonyloxy)- phenyl (2S, 3S)-2-chloro-3-methylvalerate side groups is presented. Differential scanning calorimetry, polarizing optical microscopy and X-ray diffraction measurements reveal liquid crystalline phases for all obtained polymers. A majority of the prepared polyoxiranes present cholesteric, smectic A, chiral smectic C and an undefined smectic phases. Most of the prepared polyoxetanes reveal only a chiral smectic C phase. Effect of polymer backbone and spacer length on the mesomorphic properties of the obtained polymers is discussed. Although the polyoxirane and polyoxetane backbone are more flexible than the polymethacrylate backbone, side-chain crystalization does not occur in any of the synthesized polymers. |
URI: | http://hdl.handle.net/11536/109 http://dx.doi.org/10.1080/10587259808045372 |
ISSN: | 1058-725X |
DOI: | 10.1080/10587259808045372 |
期刊: | MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS |
Volume: | 318 |
起始页: | 1 |
结束页: | 17 |
显示于类别: | Articles |
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