Studies of viscosity and excess molar volume of binary mixtures

The excess molar volumes VE of n-alkylamine, di-n-alkylamine, and tri-n-alkylamine with a series of 1-alkanols at 298.15, 303.15 and 313.15 K have been characterized in terms of the ERAS model which accounts for hydrogen bonding effects as well as for free volume effects in associating mixtures. The results obtained by adjusting the model parameters reveal a strong cross-association between the unlike molecules in the mixture resulting from strong negative values for the hydrogen bonding energy and the hydrogen bonding volume.