Densities, Viscosities, Refractive Indices, and Excess Molar Enthalpies of Methyl <i>tert-</i>Butyl Ether + Components of Pine Resins and Essential Oils at 298.15 K

Abstract

Densities, ρ, viscosities, η, refractive indices, nD, and excess molar enthalpies, , of binary mixtures containing methyl tert-butyl ether (MTBE) + α-pinene (2,6,6-trimethylbicyclo[3.1.1]hept-2-ene), + β-pinene (6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane), + p-cymene [1-methyl-4-(1-methylethyl)benzene], + (S)-(−)-limonene [(−)-1-methyl-4-(1-methylethenyl)cyclohexene], + 1,8-cineole (1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane), and + linalool (3,7-dimethyl-1,6-octadien-3-ol) were determined at 298.15 K and at atmospheric pressure using a digital density meter, a Schott measuring system, an Abbe refractometer, and a flow microcalorimeter, respectively. The excess molar volumes, , the deviations in viscosities, Δη, and in refractive indices, ΔR, and the excess molar enthalpies, , were calculated from experimental measurements. Results were fitted to the Redlich−Kister equation to obtain the adjustable parameters and standard deviations. Results were also qualitatively discussed in terms of molecular interactions.