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2 August 1995 Dielectric relaxation in the nematic and smectic A phases of nPCHB-NCS homologous series
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Proceedings Volume 2372, Liquid Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.215523
Event: Liquid Crystals: Materials Science and Applications, 1994, Zakopane, Poland
Abstract
Dielectric relaxation studies are reported of several substances belonging to the homologous series of 4-isothiocyanatophenyl 4-(trans-4-alkylcyclohexyl) benzoates (nPCHB-NCS) which exhibit the nematic (N) and smectic A(SmA) polymorphism. From the relaxation times (tau) (parallel) characterizing molecular reorientations around the short axes the activation enthalpies (Delta) H(parallel) for both phases were calculated. It was found that (Delta) H(parallel)(N) is markedly larger than (Delta) H(parallel)(SmA). The effect is interpreted on the basis of existing models of smectic A phase.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stanislaw Urban, Eva Novotna, Horst Kresse, and Roman S. Dabrowski "Dielectric relaxation in the nematic and smectic A phases of nPCHB-NCS homologous series", Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); https://doi.org/10.1117/12.215523
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