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1 February 1998 Differential thermal analysis (DTA) and dielectric studies of trans,trans-4'-n-heptyl-bicyclohexyl-4-carbonitrile under high pressure
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Buesing, T. Brueckert, A. Wuerflinger, and B. Gestblom "Differential thermal analysis (DTA) and dielectric studies of trans,trans-4'-n-heptyl-bicyclohexyl-4-carbonitrile under high pressure", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299972
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