Properties of a liquid crystalline polyester with a mesogen containing the bicyclooctylene ring |
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| Authors: | Robert W Lenz A Kameswara Rao Subrata Bhattacharya Malcolm B Polk N Venkatasubramanian |
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| Institution: |
a Polymer Science and Engineering Department, University of Massachusetts, Amherst, MA, U.S.A.
b School of Textile Engineering Georgia Institute of Technology, Atlanta, Georgia, U.S.A. |
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| Abstract: | A liquid crystalline polyester with a decamethyene flexible spacer and a mesogenic unit containing a central 1,4-bicyclo(2,2,2)octylene ring was prepared for comparison with the equivalent polymer containing a central p-phenylene ring in the mesogen. Both polymers formed a nematic phase on melting, and as expected, the former had a much lower isotropization temperature than the latter. The polymer containing the bicyclooctylene ring, however, showed a batonnet texture, indicative of a smectic phase, at a temperature above that of the nematic state, especially on cooling from the isotropic melt. |
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