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Calorimetric investigations in liquid crystalline terephthalylidene‐bis‐[4‐n‐alkylanilines] (TBAA)
Author(s) -
Wiegeleben A.,
Demus D.
Publication year - 1982
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.2170170206
Subject(s) - polymorphism (computer science) , alkyl , chemistry , thermodynamics , phase transition , calorimetry , differential scanning calorimetry , solid state , crystallography , hysteresis , calorimeter (particle physics) , organic chemistry , condensed matter physics , physics , biochemistry , detector , genotype , optics , gene
By means of the calorimeter DSC‐2 the temperatures and enthalpies of phase transitions were measured in the homologues of TBAA with the alkyl chain length n from 2 up to 10, in order to confirm the existence of nine types of liquid crystalline mesophases and of the polymorphism in the solid state within this series. Pre‐and posttransitional phenomena, hysteresis effects in low temperature smectics and relations between enthalpies and chain lenght resp. kind of concerning phases could be observed.