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Proceedings Paper

Differential thermal analysis (DTA) and dielectric studies of trans,trans-4'-n-heptyl-bicyclohexyl-4-carbonitrile under high pressure
Author(s): D. Buesing; T. Brueckert; A. Wuerflinger; B. Gestblom
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Paper Abstract

With the aid of differential thermal analysis the phase diagram of trans,trans-4'-n-heptyl-bicyclohexyl-4- carbonitrile (7CCH) established up to 200 MPa, shows stable crystal, nematic and isotropic phases. Dielectric studies on the static and complex permittivity have been performed in the frequency range 1 kHz-13 MHz up to pressures of 200 MPa. The activation parameters for the nematic phase. We find a trend of increasing values for the activation parameters, the retardation factor and the nematic potential, when we compare the heptyl series 7CB, 7PCH, and 7CCH.

Paper Details

Date Published: 1 February 1998
PDF: 5 pages
Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.299972
Show Author Affiliations
D. Buesing, Ruhr-Univ. Bochum (Germany)
T. Brueckert, Ruhr-Univ. Bochum (Germany)
A. Wuerflinger, Ruhr-Univ. Bochum (Germany)
B. Gestblom, Uppsala Univ. (Sweden)

Published in SPIE Proceedings Vol. 3318:
Liquid Crystals: Physics, Technology, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski; Jozef Zmija, Editor(s)

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