KINETICS OP PHASE TRANSFORMATION IN SOME CHOLESTERIC LIQUID CRYSTALS

U. WÜRZ, G. KLAR, S.-K. CHAN
1979 Le Journal de Physique Colloques  
RBsumL.. -La propagation de l'interface entre la phase cholestkrique et la phase bleue des esters de cholestkryl a etk mesurke comme fonction de tempkrature. Les rksultats sont interprktes comme consistants avec l'idee physique d'un profil d'interface qui ne change pas sa forme en propageant gvec une vklocitk determinke par la relaxation orientationnelle des molircules pr6s de l'interface. Cette methode d'investigation dispose d'un outil complkmentaire aux investigations dynarniques ou en
more » ... rniques ou en kquilibre pour la comprkhension supplkmentaire des transitions de phases en cristaux liquides. Abstract. -The time evolution of the interface between the cholesteric and the blue phase of the cholesteryl esters has been measured as a function-Cif supercooling. The results are interpreted as consistent with the physical picture of a shape-preserving interface profile propagating with a rate that is determined by the orientational relaxation of the molecules near the interface. This method of investigation provides a complementary tool to the more often pursued equilibrium and dynamic investigations for the further understanding of phase transformations in liquid crystals.
doi:10.1051/jphyscol:1979381 fatcat:pnzxqtlxpza55imjlqebjagmzu