Relative permittivity, density, viscosity, refractive index and ultrasonic velocity of binary mixture of ethylene glycol monophenyl ether and 1-hexanol at different temperatures

Abstract

Relative permittivity (ε), refractive index (nD), density (ρ), viscosity (η), and ultrasonic velocity (u) of liquid mixtures of ethylene glycol monophenyl ether and 1-hexanol as a function of mole fraction of 1-hexanol have been measured at three different temperatures (303.15, 313.15 and 323.15K). Various acoustical parameters viz., adiabatic compressibility (β), acoustic impedance (Z), free length (Lf), internal pressure (πi), and free volume (Vf) were evaluated from the experimental data. Excess dielectric, excess physico-chemical and excess acoustic parameters were calculated and fitted to the Redlich–Kister relation. The excess viscosity (ηE), excess relative permittivity (εE) and excess adiabatic compressibility (βE) showed negative deviation from ideality over the entire range of concentration of 1-hexanol. Various excess parameters were qualitatively analyzed to gain some insight to the intermolecular interactions in the liquid mixture.