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Thermodynamic implication of the dependence of mesomorphic transition entropy on chain-length

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Abstract

Meaning of the alkyl chain-length dependence of transition entropy in liquid crystal is discussed and clarified in a long-chain region. A method to deduce contributions of the alkyl chain and the molecular core is proposed. Application of the method suggests that, in most smectic A (SmA) - nematic (N) phase transitions, not only a molecular core (modeled by a hard-rod) but also a (terminal) alkyl chain is disordered upon the SmA→N transition.

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Authors and Affiliations

  1. Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan

    Kazuya Saito, Mayumi Ikeda & Michio Sorai

Authors
  1. Kazuya Saito
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  2. Mayumi Ikeda
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  3. Michio Sorai
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Saito, K., Ikeda, M. & Sorai, M. Thermodynamic implication of the dependence of mesomorphic transition entropy on chain-length. Journal of Thermal Analysis and Calorimetry 70, 345–352 (2002). https://doi.org/10.1023/A:1021699702018

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  • DOI: https://doi.org/10.1023/A:1021699702018

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