Transition entropies and mesomorphic behaviour of p-n-alkoxybenzyliden- p′-propoxyanilines

Abstract

Calorimetric data on the nematogenic homologous series H 7C 3-O-C 6H 4-NCH- C 6H 4-O-C n H 2 n+1 are presented. Trends in the nematic-isotropic transition temperatures. enthalpies and entropies are briefly discussed. The importance of the thermal history of the system in relation to its thermal behaviour is evidenced.