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Sivarambabu Sakamuri,Gowrisankar Manukonda,Venkateswarlu Ponneri,Sivakumar Kasibhatta 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.5
The density, ultrasonic velocity of sound and viscosity of binary mixtures of N,N-dimethyl aniline (N,NDMA)with 1-propanol, +2-propanol, +1-butanol, +2-butanol, +1-pentanol, +2-methyl-1-propanol, +2-methyl-2-propanol were measured at 303.15 K. These experimental data have been used to calculate excess volume V E, excess ultrasonic speeds uE, excess intermolecular free length Lf E, excess acoustic impedance Z E, excess isentropic compressibility κs E, deviation in viscosity Δη and excess Gibbs free energy of activation of viscous flow (G*E ). The values of Lf Eand κs E are negative over the wide range of composition for all the binary mixtures, while the values of Z Eare positive. These results have been used to discuss the nature of interaction between unlike molecules in terms of hydrogen bonding, dipole-dipole interaction, proton-acceptor interaction and dispersive forces. The viscosity data have been correlated using three equations: Grunberg and Nissan, Katti & Chaudhri and Hind et al. The excess/deviations were fitted by a Redlich-Kister equation and the results were analyzed in terms of specific interactions present in these mixtures.