Liquid-crystalline main chain polyesters derived from p-phenylenediacrylic acid |
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| Authors: | J Barbera E Melendez F Navarro M Piñol J L Rodriguez J L Serrano |
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| Institution: | 1. Química Orgánica, Facultad de Ciencias-ICMA , Universidad de Zaragoza-CSIC , 50009, Zaragoza , Spain;2. Cables de Comunicaciones S. A. , P. O. Box 581, 50080, Zaragoza , Spain |
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| Abstract: | 4,4′-(p-phenylenediacryloyloxy)-dibenzoyl chloride was polycondensed at 220°C with several diols in order to obtain liquid-crystalline polymers. The mesomorphic properties were studied by optical microscopy and differential scanning calorimetry. Gelation due to thermal crosslinking occurred at higher temperatures. With the exception of 2,2′-biphenyldiol derivative, all the polymers derived from aliphatic diols, dihydroxy ethers and aromatic diphenols exhibit mesogenic behaviour. |
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