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The influence of asymmetric lateral branching in the flexible spacer on the properties of a main-chain thermotropic liquid crystal polyester

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Summary

The synthesis and characterisation of the thermotropic polyester poly[oxy-(1,4-dimethyltetramethylene) oxycarbonyl-3-chloro-1,4-phenyleneoxyterephthaloyloxy-2-chloro-1,4-phenylenecarbonyl] is described, and its thermal behaviour analysed. The effect of asymmetrical substitution in the tetramethylene spacer is analysed and the polymer compared with its non-substituted homologue. Substitution of methylene units at the 1,4 positions in the spacer results in a considerable lowering of the both the transition temperatures and the associated molar enthalpies, and inhibits the formation of three-dimensional order.

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Authors and Affiliations

  1. Instituto de Ciencia y Tecnología de Polímeros, C.S.I.C., c/Juan de la Cierva 3 E-28006, Madrid, Spain

    J. del Pino, C. Marco, G. Ellis, M. A. Gómez & J. G. Fatou

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  1. J. del Pino
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  2. C. Marco
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  3. G. Ellis
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  4. M. A. Gómez
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  5. J. G. Fatou
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del Pino, J., Marco, C., Ellis, G. et al. The influence of asymmetric lateral branching in the flexible spacer on the properties of a main-chain thermotropic liquid crystal polyester. Polymer Bulletin 33, 505–512 (1994). https://doi.org/10.1007/BF00296157

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  • DOI: https://doi.org/10.1007/BF00296157

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