MODULATED DIFFERENTIAL SCANNING CALORIMETRY - TRANSITIONS BETWEEN MONOTROPIC AND ENANTIOTROPIC PHASES OF A CHOLESTERIC LIQUID-CRYSTAL

Citation
F. Roussel et Jm. Buisine, MODULATED DIFFERENTIAL SCANNING CALORIMETRY - TRANSITIONS BETWEEN MONOTROPIC AND ENANTIOTROPIC PHASES OF A CHOLESTERIC LIQUID-CRYSTAL, Journal of thermal analysis, 47(3), 1996, pp. 715-725
Citations number
6
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
03684466
Volume
47
Issue
3
Year of publication
1996
Pages
715 - 725
Database
ISI
SICI code
0368-4466(1996)47:3<715:MDSC-T>2.0.ZU;2-G
Abstract
The Modulated Differential Calorimetry (MDSC) is applied to the determ ination of the reversibility in the cholesteryl chloride, which presen ts a cholesteric monotropic phase between the isotropic and crystallin e states. The experimental modulation parameters that govern this meth od i.e. frequency, amplitude and heating/cooling rate, are determined. MDSC curves and complementary thermomicroscopical observations assign melting, crystallization and liquid cholesteric transition as 'non re versing', and clarification as 'reversing'.