Densities, Viscosities, Refractive Indexes, and Surface Tensions for Binary and Ternary Mixtures of Tetrahydofuran, 2-Propanol, and 2,2,4-Trimethylpentane

Abstract

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.

Application of the UNIFAC model for prediction of surface tension and thickness of the surface layer in the binary mixtures

“…(19). As observed in these figures and also other same figures (except methanol/acetonitrile), the variation of the thickness and relative adsorptions with composition follows distinctively same patterns.…”

“…doi:10.1016/j.jcis.2010.12.003 further purifications. The purity of reagents was checked by comparing the measured surface tension at 298.15 K with those reported in the literatures [16][17][18][19]. The resultant values are in good agreement with values found in the literature and reported in Table 1.…”

Densities, viscosities, refractive indices, and surface tensions for binary and ternary mixtures of 2-propanol, tetrahydropyran, and 2,2,4-trimethylpentane

“…In the past, experimental densities, viscosities, refractive indexes, and surface tensions for the binary mixtures of (2-propanol + 2,2,4-trimethylpentane) at T = (288. 15, 298.15, and 308.15) K were measured in our laboratory [1]. However, we are not aware of any literature data regarding the properties for the mixtures proposed in this study.…”

Investigation on thermophysical and excess properties of binary mixtures of imidazolium based ionic liquids at temperatures (293.15 to 323.15) K: III [C n mim][PF 6 ] ( n = 4, 6, 8) + THF

“…56 17 1358. 30 Standard uncertainties u are: u(q) = 0.8 kgÁm À3 , u(u) = 0.5 mÁs À1 , u(n D ) = 0.0008 and u(T) = 0.05 K. All the experiments were carried out at 100.7 kPa pressure with u(P) = 0.5 kPa. Standard uncertainties u(x) = 1 Á 10 À4 , u(q) = 0.8 kg Á m À3 and u(T) = 0.05 K. All the experiments were carried out at 100.7 kPa pressure with u(P) = 0.5 kPa.…”