Molecular Interaction Studies of Binary Mixtures of Diethyl Oxalate With Butyl Vinyl Ether, Diisopropyl Ether, Anisole and Dibutyl Ether in Terms of Thermodynamic, Transport and Acoustic Properties

Abstract

Viscosity, the speeds of sound and density were measured in the binary mixtures of diethyl oxalate with butyl vinyl ether, diisopropyl ether, anisole and dibutyl ether at T = 303.15, 308.15 and 313.15 K. The experimental data were used to calculate the excess molar volume  ,deviation in viscosity Δη and the acoustical parameters, namely isentropic compressibility (K_S), free volume (V_f ), free length (L_f ) and internal pressure (π_i). The excess or deviation properties were fitted to the Redlich-Kister polynomials and the results interpreted in terms of the molecular interactions present in mixtures. Theoretical viscosities were calculated using the Grunberg-Nissan, Lobe and Krishnan-Laddha models before their merits were studied in terms of interaction parameters.