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
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'.