Densities and Speeds of Sound of Binary Liquid Mixtures of 1,4-Butanediol with 2-Methoxyethanol and 2-Propoxyethanol at T = (303.15, 308.15, 313.15 and 318.15) K

摘要

Densities, rho, and speeds of sound, u, for the binary liquid mixtures of 1,4-butanediol (1,4-BD) + 2-alkoxyethanols {2-methoxyethanol (2-ME), or 2-propoxyethanol (2-PE)} over the whole composition range have been measured at T = (303.15, 308.15, 313.15 and 318.15) K, and at atmospheric pressure (p = 0.1 kPa). Experimental data for the densities and speeds of sound have been used to derive the quantities like excess molar volume, V-m(E), excess isentropic compressibility, K-S(E), excess molar isentropic compressibility, K-S,(E)(m), excess speed of sound, u(E), and excess isobaric thermal expansion alpha(E)(p). These excess parameters were correlated by Redlich-Kister polynomials. Excess partial molar volumes ((V) over bar (E)(m,1) and (V) over bar (E)(m,2) ) and their limiting values at infinite dilution ((V) over bar (0E)(m,1) and (V) over bar (0E)(m,2)) have been calculated from the experimental density measurements and were analytically obtained using the Redlich-Kister polynomials. The results are discussed in terms of intermolecular interactions and their dependence on composition and temperature.