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Synthesis of Ferroelectric Liquid Crystalline Polymers by Ring Opening Polymerization

Published online by Cambridge University Press:  10 February 2011

C. S. Hsu  and
C. J. Lee
C. S. Hsu
Affiliation:
Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050, ROC.
C. J. Lee
Affiliation:
Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050, ROC.
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Abstract

The synthesis of two series of side-chain liquid crystalline polyoxetanes and polyoxiranes containing 4-alkanyloxybiphenyl-4′ -yl (2S,3S)-2-chloro-3-methylvalerate side groups is presented. Differential scanning calorimetry, polarizing optical microscopy, and X-ray diffractometry reveal smectic mesomorphism for all obtained polymers. Most of the prepared polyoxetanes present smectic A and chiral smectic C phases. The polyoxetane containing tweleve methylene units in the spacer is the only one showing two enantiotropic smectic A and B phases. All of the obtained polyoxiranes display two enantiotropic smectic A and B phases. Although the polyoxetane and polyoxirane backbones are more flexible than the polymethacrylate backbone, side-chain crystallization do not occur in any of the synthesized polymers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 425: Symposium I – Liquid Crystals for Advanced Technologies , 1996 , 101
Copyright
Copyright © Materials Research Society 1996

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