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Phase transition and the packing structure of the side mesogenic groups of liquid crystalline side-chain copolymers

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Summary

Copolymers consisting of cholesteryl 11-methacryloyloxy-undecanoate (ChMO-10) and t-buthyl methacrylate (t-BMA) were studied by DSC method and by small angle X-ray scattering method (SAXS). Although homopolymer (pChMO-10) has two different packing structures which are a single-layer packing structure and a two-layer packing one, copolymers (co-pChMO-10-t-BMA) have only the single layer packing one in their mesophase. Furthermore, transition entropy at a clearing point of co-pChMO-10-t-BMA (80/20) is larger than that of pChMO-10. Adequate distance of the mesogenic groups in the direction of a short axis of the mesogenic groups, produced by introduction of non-mesogenic units, seems to stabilize the single-layer packing structure.

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Authors and Affiliations

  1. Department of Polymer Chemistry, Kyoto University, 606, Kyoto, Japan

    Takanari Yamaguchi & Tadahiro Asada

  2. Department of Chemistry, Risumeikan University, 603, Kyoto, Japan

    Naotake Nakamura

Authors
  1. Takanari Yamaguchi
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  2. Tadahiro Asada
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  3. Naotake Nakamura
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Yamaguchi, T., Asada, T. & Nakamura, N. Phase transition and the packing structure of the side mesogenic groups of liquid crystalline side-chain copolymers. Polymer Bulletin 25, 597–602 (1991). https://doi.org/10.1007/BF00293520

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  • DOI: https://doi.org/10.1007/BF00293520

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