Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2-disubstituted ethanes at T = (298.15, 308.15 and 318.15) K

Densities (rho), viscosities (eta), ultrasonic speeds (u) and refractive indices (n(D)) of the binary blends of 1,4dioxane (DO) with ethylenediamine (EDA), 1,2-dichloroethane (DCE) and monoethanolamine (MEA) were measured at T = (298.15-318.15) K under atmospheric pressure over the entire composition range. Various experimental data were utilized to estimate the excess molar volumes (V-m(E)), excess viscosities (eta(E)), excess molar refractions (R-m(E)), excess isentropic compressibility (K-S(E)), excess intermolecular free length (L-f(E)), etc., and analyzed in terms of molecular interactions and structural effects. Partial molar volumes ((V) over bar m,1 (0) and (V ) over barm,2 (0)) and excess partial molar volumes ((V) over bar m,1 (0,E) and (V) over bar m,2 (0,E)) at infinite dilution of the components were derived and discussed in terms of volume changes. Prigogine-Flory-Paterson theory and Peng-Robinson equation of state were used to predict V-m(E) and eta values of the blends. IR spectra of the blends were correlated to the molecular interactions therein the blends. (C) 2015 Elsevier B.V. All rights reserved.