Studies of Intermolecular Interaction in Binary Nematic Mixtures of p-Methoxybenzylidene—p′-n-Butylaniline and p-Cyano-p′-n-Pentylbiphenyl by Dielectric Relaxations

Abstract

Anisotropic dielectric relaxations at the nematic state under magnetic field and viscosities at the isotropic state were measured in MBBA-CPB systems with various mole% of CPB. The intermolecular interaction in the systems with different mole% of CPB was estimated by the MaierSaupe theory from the dielectric relaxations and the viscosities. A long range-intermolecular interaction increased anomalously near the two CPB concentrations exhibiting the eutectic points (15 and 75 mole% of CPB). This was explained by some component fluctuation originating in the inversion of solvent-solute relationships at the eutectic mixing ratio.