Abstract: | To analyse the order of the phase transitions in a number of mesomorphic benzylidene anilines, the DSC (Differential Scanning Calorimetry) method proposed by NAVARD and HAUDIN is used. This method involves the measurement of the ratio (N) of the DSC peak heights H2/H1 for a given transition, performed with two different heating rates (T2/T1). N is a function of the ratio r2/r1(= R) and the magnitude of N provides a simple way to characterize the order of a phase transition. |