Densities, viscosities, refractive indexes, and surface tensions of a ternary system (tetrahydofuran + 2-propanol + 2,2,4-trimethylpentane) at T = 298.15 K and three constituent binary systems at T = (288.15, 298.15, and 308.15) K were measured at atmospheric pressure. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling ball principle. Refractive indexes were measured using a digital Abbe-type refractometer. Surface tensions were determined by the Wilhelmy-plate method. These results were used to calculate excess molar volumes V E, deviations in the viscosity Δη, deviations in the refractive index Δn D, and deviations in the surface tension Δσ. The calculated quantities of V E, Δη, Δn D, and Δσ were fitted to variable-degree polynomials. The ternary results were compared with the values estimated by different empirical equations of prediction.

Densities, viscosities, and refractive indices of the ternary system ethanol + 2-methylpropan-2-ol + 2,2,4trimethylpentane at T ) 298.15 K and the binary systems ethanol + 2-methylpropan-2-ol, ethanol + 2,2,4-trimethylpentane, and 2-methylpropan-2-ol + 2,2,4-trimethylpentane were measured at T ) (298. 15, 308.15, and 318.15) K and atmospheric pressure over the whole composition range. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling ball principle. Refractive indices were measured using a digital Abbe-type refractometer. Excess molar volumes (V E ), deviations in the viscosity (∆η) from the mole fraction average, and deviations in the refractive index (∆n D ) from the volume fraction average for the mixtures were derived from experimental data. The binary and ternary data of V E , ∆η, and ∆n D were correlated as a function of the mole fraction by using the Redlich-Kister and the Cibulka equations.

Densities, viscosities, refractive indices, and surface tensions of a ternary system (1,3-dioxolane + 2-propanol + 2,2,4-trimethylpentane) at T = 298.15 K and two binary systems (1,3-dioxolane + 2-propanol and 1,3-dioxolane + 2,2,4-trimethylpentane) at T = (288.15, 298.15, and 308.15) K were measured over the extensive composition range at atmospheric pressure. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling-ball principle. Refractive indices were measured using a digital Abbe-type refractometer. Surface tensions were determined by the Wilhelmy-plate method. The excess molar volumes V E were calculated from the experimental density data. The results are discussed in terms of molecular interactions.