Excess Parameters of Binary Mixtures of 1, 2-Dimethoxyethane-Propylene Carbonate and 2-Methoxyethyl Ether-Propylene Carbonate

Abstract

The excess parameters associated with liquid mixtures were evaluated in order to ascertain the relative strength of intermolecular interactions in binary mixtures of 1,2-Dimethoxyethane-Propylene Carbonate (DME-PC) and 2-Methoxyethyl ether-Propylene Carbonate (DGM-PC). The density and viscosity of pure components of Propylene Carbonate (PC), 1,2-Dimethoxyethane (DME), 2-Methoxyethyl ether (DGM) and mixtures (DME-PC and DGM-PC) were measured within the composition range of 0 to 100% at temperatures of 298.15, 308.15, 318.15, 328.15 and 338.15 K. Experimental density and viscosity values decreased with an increase in system temperature and mole fractions of DME and DGM. Mathematical operations were conducted from the density and viscosity data at 298.15 K to resolve the magnitude of excess molar volume (VmE), excess viscosity (ηE), excess Gibbs free energy of activation of viscous flow (G*E) and Grunberg-Nissan interaction parameter (d). These parameters were mainly of negative value, which signified the dominance of dipole-dipole interactions within DME-PC and DGM-PC solvent systems. The existence of interactions between the components of the binary mixtures was also reflected by the non-zero result findings for values of excess parameters.