Viscometric studies and modelling for binary liquid mixtures of 1-butoxy-2-propanol and 1-tert-butoxy-2-propanol with di-n-propylamine, diethylamine and triethylamine at 298.15, 303.15 and 308.15 K

In continuation to our previous publications, non-ideal behaviour of binary mixtures of 1-butoxy-2-propanol and 1-tert-butoxy-2-propanol with amines namely di-n-propylamine, diethylamine and triethylamine have been discussed in present study. For this purpose, viscosity of these liquids and their binary mixtures have been measured at temperatures (298.15, 303.15 and 308.15) K over the entire composition range. Deviation in viscosity (Delta eta) and excess Gibbs free energy of activation for viscous flow (Delta G(*E)) have been calculated using the measured data. Strong intermolecular interaction among unlike molecules is shown by trend of calculated parameters. Delta eta and Delta G(*E) have been correlated with composition using Redlich-Kister polynomial. Using Jouyban-Acree model, viscosity data have been correlated with composition. Change in enthalpy (Delta H) and change in entropy (Delta S) of activation for viscous flow have also been calculated. In addition to this, the correlation ability of semi-empirical models of viscosity has been tested for studied systems.