Volumes of mixing and viscosities of methylacetate + n-alkanes and n-butylacetate + n-alkanes at 298.15 K: an interpretation in terms of the van-patterson, the absolute rate and free volume theories

Abstract

The excess molar volumes V E, viscosities η, excess viscosities Δ1nη and excess activation energies of viscous flow Δ G* E of the binary mixtures of methylacetate + and n-butylacetate + n-hexane, n-heptane, n-octane, n-nonane, n-decane, n-dodecane, n-tetradecane and n-hexadecane have been determined at 298.15 K as a function of the mole fraction. All the mixtures studied exhibit positive excess molar volumes which increase with the length of the n-alkane chain. The excess viscosities and excess activation energies of viscous flow are negative for lower n-alkane systems and turn positive for longer n-alkane systems. The Van-Patterson, the absolute rate and free volume theories predict the experimental data only poorly.