Rao, K. R. K. ; Rao, J. V. ; Venkatacharyulu, P. ; Baliah, V. (1986) Density and ultrasonic velocity measurements in hexyloxybenzylidene phenylazoaniline Molecular Crystals and Liquid Crystals, 136 . 307 - 316. ISSN 1058-725X
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Related URL: http://dx.doi.org/10.1080/00268948608074732
Abstract
The temperature variation of density and ultrasonic velocity of the liquid crystal hexyloxybenzylidene phenylazoaniline are reported. The density across the smectic A-smectic B transition is more predominant than the other transitions. The density variation with temperature and the calculated thermal expansion coefficients suggest that the transitions isotropic liquid-nematic, nematic-smectic A and smectic A-smectic B are of first order. Anomalous behaviour of ultrasonic velocity is observed across the isotropic liquid-nematic transition and prominent dips in velocity are observed at the nematic-smectic A and smectic A-smectic B transitions. The adiabatic compressibility (βad) Rao number (Ra) and molar compressibility (B) are estimated using the experimental density and ultrasonic velocity.
Item Type: | Article |
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Source: | Copyright of this article belongs to Taylor and Francis Ltd. |
ID Code: | 5139 |
Deposited On: | 18 Oct 2010 06:11 |
Last Modified: | 16 May 2016 15:41 |
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