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Phase transition in polyamides

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Summary

A series of poly(3,3′, 5,5′-tetraethyldiphenylmethane-1,m-alkanedi-carboxamide(poly(TEDPM-ADA(m=8–18)))) were synthesized from 1,m-alkane-dicarboxylic acids(ADA(m=8–18)) and 4,4′-diamino-3,3′,5,5′-tetraethyl-diphenylmethane by use of direct polycondensation in the presence of triphenylphosphite. The enantiotropic nematic liquid crystals were observed in the m=12–18 and monotropic liquid crystals were observed in the m=8–11 in poly(TEDPM-ADA). Mesogenicity of the polyamides increases with an increase in the number of methylene spacers, m.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, 501-11, Gifu, Japan

    Kelichi Moriya, Tohru Minagawa & Shinichi Yano

Authors
  1. Kelichi Moriya
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  2. Tohru Minagawa
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  3. Shinichi Yano
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Moriya, K., Minagawa, T. & Yano, S. Phase transition in polyamides. Polymer Bulletin 25, 591–595 (1991). https://doi.org/10.1007/BF00293519

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  • DOI: https://doi.org/10.1007/BF00293519

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