Excess molar volumes and viscosities for binary mixtures of 2-propoxyethanol and of 2-isopropoxyethanol with propylamine and dipropylamine at (298.15, 308.15, and 318.15) K

Excess molar volumes V-m(E) and viscosities eta have been measured as a fun ction of composition for the binary mixtures of 2-propoxyethanol and of 2-i sopropoxyethanol with propylamine and dipropylamine at (298.15, 308.15, and 318.15) K. From the experimental data, the deviation in the viscosity eta from Sigmax(i) In eta (i) has been calculated at various temperatures. The excess molar volumes are negative whereas the deviation in the viscosities is positive for all investigated systems over the whole composition range. These results suggest that the stronger hydrogen bonds between unlike molec ules reduce the volume of the solution and make the solution high viscosity . A Redlich-Kister type equation was applied to fit the excess volumes and viscosity deviations, and McAllister's three-body and four-body interaction models were also used to correlate the kinematic viscosities.