Volumetric, ultrasonic, viscometric and refractive index studies of molecular interactions in binary mixtures of 1-buty1-3-methylimidazolium tetrafluoroborate with methyl acrylate at temperatures from 293.15 to 318.15 K

In this work the intermolecular interaction of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4] and methyl acrylate [MA] were examined from the measurement of physicochemical properties (density, ultrasonic speed, viscosity and refractive index) at temperatures, T/K = 293.15 to 318.15 and atmospheric pressure. The experimental data were used to calculate the excess properties such as excess molar volume, VmE, excess speed of sound, u(E), excess molar isentropic compressibility, K-s,K-m,(E) deviation in viscosities Delta eta, and deviation in refractive index, Delta phi n(D). In addition, the partial molar volume, ((V) over bar (m,1) and (V) over bar (m,2)) and compressibility ((K) over bar (s,m,1) and (K) over bar (s,m,2)); and excess partial molar volume, (V-m,1(E), and V-m,2(E)); and compressibility, ((K) over bar (E)(s,m,1) and (K) over bar (E)(s,m,2)) over the entire composition range; and partial molar volume ((V) over bar (center dot)(m,1) and (V) over bar (center dot)(m,2)); and compressibility ((K) over bar (s,m,1)degrees and (K) over bar (s,m,2)degrees) and excess partial molar volume ((V) over bar (m,1)degrees(E), and (V) over bar (m,2)degrees(E)) and compressibility ((K) over bar (s,m,1)degrees(E) and (K) over bar (s,m,2)degrees(E)) at infinite dilution have also been calculated. The correlations of these excess properties were made with the Redlich-Kister polynomial equations. From the variations of these parameters with composition and temperature, the results were discussed from the point of intermolecular interactions prevailing in this system. Also, some theoretical mixing rules (Lorentz-Lorenz, Gladstone-Dale, Arago-Biot, Weiner and Eykman) usually used in correlating the refractive indexes were assessed and results were compared with experimental data. (C) 2018 Elsevier B.V. All rights reserved.