Studies of viscosities of dilute solutions of alkylamine in non-electrolyte solvents: I. Aliphatic and aromatic hydrocarbons

Viscosities, η, of dilute solutions of n-propylamine, n-butylamine, di-n-propylamine, di-n-butylamine, tri-n-propylamine, and tri-n-butylamine in cyclohexane, benzene at 303.15 and 313.15 K and of triethylamine in n-heptane, cyclohexane, benzene, toluene, ethylbenzene and p-xylene at 303.15 K have been measured. The specific viscosities, (η−ηS0)/ηS0, and viscosity deviations, Δη, have been calculated. Based on Eyring’s theory of absolute reaction rates, the values of excess Gibbs energy of activation, ΔG∗E, of viscous flow has been determined. The results have been analysed in terms of Herskovits and Kelly equation and Nakagawa equation.