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Synthesis and characterization of side-chain liquid crystalline polysiloxanes

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Abstract

The synthesis and characterization are described for a series of side-chain liquid crystal polysiloxanes using polyhydrosilylation reaction between a poly(hydrogen methyl-co-dimethylsiloxanes),-(OSiHMe)x,-(OSiMe2)y-, where x/y was 13/87, 30/70, 55/45, 73/27 and 98/2, and [4-(allyloxy)benzoyll biphenyl mesogenic group. The side-chain liquid crystal polysiloxanes were characterized by1H NMR,13C NMR, IR, gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and optical polarizing microscopy. The dimethylsiloxane segment factors governing thermal transition temperatures and activation energy (Ea) of the nematic-to-isotropic phase transition are discussed.

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Authors and Affiliations

  1. Department of Applied Chemistry, Chung Cheng Institute of Technology, Taoyuan, Taiwan, 33059, ROC

    T. C. Changi & W. Y. Shen

  2. Chemical Systems Research Division, Chung Shan Institute of Science & Technology, Taoyuan, Taiwan 32507, ROC

    Y. S. Chiu

  3. Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30043, ROC

    H. B. Chen & S. Y. Ho

Authors
  1. T. C. Changi
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  2. W. Y. Shen
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  3. Y. S. Chiu
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  4. H. B. Chen
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  5. S. Y. Ho
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Changi, T.C., Shen, W.Y., Chiu, Y.S. et al. Synthesis and characterization of side-chain liquid crystalline polysiloxanes. J Polym Res 2, 121–126 (1995). https://doi.org/10.1007/BF01493212

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