Thermal properties of 4-alkyl-4′-cyanostilbenes: a new series of liquid crystal compounds |
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| Authors: | Robert J Cox Richard C Gaskill Julian F Johnson Nicholas J Clecak |
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| Institution: | Institute of Materials Science, University of Connecticut, Storrs, CT 06268 U.S.A.;I.B.M. Research Laboratory, San Jose, CA 95193 U.S.A. |
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| Abstract: | The transition heats and temperatures of a series of 4-alkyl-4′-cyanostilbenes were measured with the DuPont 990 thermal analyzer. The entropies of both the solid-to-mesophase and the mesophase-to-isotropic liquid was found to be dependent on the number of carbons in the alkyl on the molecule. The entropy change in the nematic-to-smectic transition found in the C7 member of the series was found to be extremely small. |
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