Relative permittivities, densities, refractive indices and ultrasound velocities of the binary systems of γ-butyrolactone with methanol, ethanol, 1-butanol, and 1-octanol

Relative permittivities, epsilon, densities, rho, refractive indices, n(D), and ultrasonic velocities, u, were measured for the binary systems of gamma-butyrolactone with methanol, ethanol, and 1-octanol at 298.15 K and with 1-butanol at 298.15 K and 303.15 K, over the entire composition range. From the experimental results, the excess volume, V-E, and the deviations in relative permittivity, Delta epsilon, ultrasonic velocity, Delta u, isentropic compressibility, Delta k(s), and molar polarization, Delta P-m, were calculated. The above functions show deviations from the additivity law, which depend on the length of the carbon chain of the alcohol.