The effective use of the precise solution of the van Laar equation for the calculation of the binary phase diagram with a smectic C phase

Abstract

The paper presents the calculation method of phase diagrams of binary liquid crystal systems based on the original van Laar equation. Phase transition lines are obtained using the differential scanning calorimeter data with the accounting for an interaction in system components, even for weak first-order transitions. Minimum set of experimental data is necessary. The method was applied for the calculation of phase diagrams of different systems containing smectic C - nematic transitions. Surprisingly good results had been obtained.