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DSC characterisation of various phase transitions in mesomorphic benzylidene anilines
Author(s) -
Pisipati V. G. K. M.,
Rao N. V. S.,
Alapati P. R.
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.2170241221
Subject(s) - differential scanning calorimetry , phase transition , phase (matter) , calorimetry , crystallography , order (exchange) , chemistry , materials science , analytical chemistry (journal) , thermodynamics , organic chemistry , physics , finance , economics
To analyse the order of the phase transitions in a number of mesomorphic benzylidene anilines, the DSC (Differential Scanning Calorimetry) method proposed by N AVARD and H AUDIN is used. This method involves the measurement of the ratio ( N ) of the DSC peak heights H 2 / H 1 for a given transition, performed with two different heating rates ( T 2 / T 1 ). N is a function of the ratio r 2 / r 1 (= R ) and the magnitude of N provides a simple way to characterize the order of a phase transition.