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Thermal transitions of liquid crystal polyesters: Poly(decamethylene-4,4′-diphenoxy terephthalate)

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Summary

The thermal transitions of liquid crystalline poly (decamethylene-4,4′-diphenoxy terephthalate) have been studied by differential scanning calorimetry, X ray diffraction and thermoptical microscopy. At room temperature a three dimensional order and a smectic mesophase coexist. The crystal-smectic mesophase transition occurs at 240°C and at higher temperature, 250–260°C, a transition from smectic C to nematic has been observed, before the isotropic transition at 290°C. The no previously known smectic C-nematic transition has been detected by microscopy, observing bars and striated textures, and by X ray diffraction patterns obtained in the whole range of temperatures.

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Authors and Affiliations

  1. Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, E-28006, Madrid, Spain

    I. Campoy, C. Marco, M. A. Gómez & J. G. Fatou

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  1. I. Campoy
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  2. C. Marco
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  3. M. A. Gómez
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  4. J. G. Fatou
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Campoy, I., Marco, C., Gómez, M.A. et al. Thermal transitions of liquid crystal polyesters: Poly(decamethylene-4,4′-diphenoxy terephthalate). Polymer Bulletin 27, 81–88 (1991). https://doi.org/10.1007/BF00296329

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  • DOI: https://doi.org/10.1007/BF00296329

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