Estimation of Dynamic viscosities, Excess molar volumes and Refractive indices of Ternary Liquid Mixtures

Abstract

Abstract At atmospheric pressure and over the whole concentration range, densities, viscosities and refractive indices of a ternary system (tetrahydofuran + 2-propanol + 2,2,4-trimethylpentane) and three constituent binary systems at T = 298.15 K were measured. The observed values of excess volumes were obtained from the measured values of density. These findings were utilized to determine excess molar volumes (VE), viscosity variances (Δη), and refractive index deviations (Δn). The estimated values of VE, η, and n were fitted to polynomials of variable degrees (Redlich - Kister). The values estimated by several theoretical equations of prediction (Lorentz-Lorentz (L-L) relation, Flory model, Glinski model, Ramaswamy and Anbananthan (RS), and McAllister three and four-body interaction models) were compared with the ternary results (McA-3&McA-4). In conclusion, these models can help us to understand the viscosities and refractive indices of liquid mixtures. We can analyze interactions involving liquids with the use of the computed deviation quantities (VE, Δη, and Δn). These liquid mixtures' associated and non-associated processes were examined and found to be connected. When compared to non-related processes, associated processes produce a fair amount of agreement between theory and experiment.