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Coefficient of volume expansivity and thermoacoustic parameters in certain alkoxybenzylidene butylanilines‐IA
Author(s) -
Venkatachuryulu P.,
Prasad K. S. R.,
Prasad N. V. L. N.,
Rao J. V.
Publication year - 1989
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170240915
Subject(s) - constant (computer programming) , thermodynamics , isotropy , homologous series , phase transition , volume (thermodynamics) , chemistry , series (stratigraphy) , physics , crystallography , optics , geology , paleontology , programming language , computer science
A number of thermoacoustic parameters including the Sharma constant S o are evaluated in the homologous series of alkoxybenzylidene butylanilines with m = 4 to 7, to understand whether these parameters can be used to understand the anomalous behaviour at the phase transition temperatures and pretransitional effects on either side of the transition. The Sharma constant which was shown to be a constant in a number of non‐mesomorphic systems is also found to be a constant for the mesogens belonging to this series both in their liquid crystalline as well as isotropic state. It is observed that almost all these parameters exhibit anomalous behaviour at the transition and pretransitional effects on either side of the transition. The results are discussed.