Intermolecular interactions in binary mixtures of 2-diethylethanolamine with 1-propanol and 1-butanol at different temperatures

The densities, rho and ultrasonic speeds, u of binary mixtures of 2-diethylethanolamine (2-DEEA) with 1-propanol and 1-butanol, including those of pure liquids, are measured at 293.15, 303.15 and 313.15 K, over the entire composition range. From the experimental values of rho and u, molar volume, V-m, isentropic compressibility, kappa(s), acoustic impedance, Z, excess molar volume, V-m(E), excess ultrasonic velocity, u(E), excess acoustic impedance, Z(E), excess isentropic compressibility, kappa(E)(S) and excess molar isentropic compressibility, K-s,m(E) are calculated. Further, the partial molar isentropic compressibility (K) over bar (s,m,1) and (K) over bar (s,m,2), and excess partial molar isentropic compressibility (K) over bar (E)(s,m,1) and (K) over bar (E)(s,m,2) over the entire composition range, the partial molar isentropic compressibility (K) over bar (0)(s,m,1) and (K) over bar (0)(s,m,2), and excess partial molar isentropic compressibility (K) over bar (0E)(s,m,1) and (K) over bar (0E)(s,m,2) of the individual components at infinite dilution are also deduced. The variations of the consequent parameters indicate the presence of specific intermolecular interactions between the binary liquid systems. The infrared spectra are also recorded at room temperature (293.15 K). (C) 2018 Elsevier Ltd.