Studies of viscosity and excess molar volume of binary mixtures.: 1. Propylamine+1-alkanol mixtures at 303.15 and 313.15 K

The excess molar volume VE viscosity deviation Δη, excess viscosity Δln η and excess Gibbs energy of activation ΔG*E of viscous flow have been investigated from the density ρ and viscosity η measurements of seven binary mixtures of propylamine with ethanol, propanol, butanol, pentanol, heptanol, octanol and decanol over the entire range of mole fractions at 303.15 and 313.15 K. The results were fitted to variable degree of polynomials. The viscosity data have been correlated with the equations of Kendall and Monroe, Grunberg and Nissan, Hind, McLaughlin and Ubbelohde, Tamura and Kurata, Katti and Chaudhri, McAllister, Heric and Brewer, and of Auslaender. The systems studied, exhibit very strong cross association due to strong H-bonding between –OH and –NH2 groups. As a consequence of this strong intermolecular association, all seven systems have very large negative VE.