Volumetric, acoustic, and viscometric studies of molecular interactions in binary mixtures of dipropylene glycol dimethyl ether with 1-alkanols at 298.15 K

In this work densities, ρ, ultrasonic speeds, u, and viscosities, η, have been measured over the whole composition range for the binary mixtures of dipropylene glycol dimethyl ether (DPGDME) with ethanol, 1-propanol, 1-pentanol, and 1-heptanol at 298.15 K along with the properties of the pure components. By using the experimental values of ρ, u, and η, excess molar volume, VmE, deviations in viscosity, Δη, excess free energy of activation for viscous flow, ΔG*E, excess molar isentropic compressibility, KS,mE, deviation of the speeds of sound, uD, from their ideal values uid in an ideal mixtures, apparent molar volume, and apparent molar compressibility, V-barφ,i0 and K-barφ,i0 of the components at infinite dilution have been calculated. Finally, the experimental viscosity data have been correlated by the methods of Grunberg-Nissan, Hind, Tamura-Kurata, Chaudhry, Auslaender, Heric, and with McAllister correlations