Synthesis of ferroelectric liquid crystalline polyoxiranes and polyoxetanes by ring opening polymerization

Chain-Shu Hsu*, Wei Lung Liau

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume318
DOIs
StatePublished - 1 Dec 1998
EventProceedings of the 1998 IEEE International Conference on Microelectronic Test Structures - Kanazawa, Jpn
Duration: 23 Mar 199826 Mar 1998

Keywords

  • Ferroelectric liquid crystalline polymers
  • Polyoxetane
  • Polyoxirane

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