標題: Synthesis of ferroelectric liquid-crystalline polymethacrylates containing 1,2-diphenylethane based mesogens
作者: Hsu, CS
Her, BS
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
公開日期: 1-十二月-1996
摘要: The synthesis of side-chain liquid-crystalline polymethacrylates containing (2S)-2-chloro-4-methylvaleric acid end groups and 1,2-diphenylethane based mesogenic units is presented. Differential scanning calorimetry, optical polarizing microscopy and X-ray diffraction were used to determine the thermal transitions and to analyze the anisotropic phases. Among the methacrylate monomers prepared in this study, those without lateral chloro substituent show only a smetic A phase while those with a lateral chloro substituent display a cholesteric phase. All polymers exhibit smectic mesomorphism and do not undergo side-chain crystallization. All four polymethacrylates without lateral chloro substituents reveal enantiotropic smectic A and smectic B phases while the other four polymethacrylates with lateral chloro substituents reveal enantiotropic smectic A and chiral smectic C phases. The results seem to demonstrate that incorporating a lateral chloro substituent into the mesogenic core enhances the formation of a tilted chiral smectic C phase.
URI: http://hdl.handle.net/11536/911
ISSN: 1022-1352
期刊: MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume: 197
Issue: 12
起始頁: 4105
結束頁: 4118
顯示於類別:期刊論文


文件中的檔案:

  1. A1996VY45800011.pdf