Viscometric Studies of Molecular Interactions in Binary Liquid Mixtures of Isomeric Xylenes with Methanol

Abstract

Dynamic viscosities (η exp ) for the binary mixtures of methanol with isomeric (o-, m-, and p-derivatives) xylenes were measured at T = (303.15, 308.15, 313.15, 318.15, and 323.15) K and atmospheric pressure (p = 101 kPa). The viscosity deviation (Δη) that has been derived from the η exp was correlated using a Redlich− Kister-type equation. The η exp values were compared with the calculated viscosities (η cal ) obtained using generalized correlation models, such as Bingham, Arrhenius, Kendall−Monroe, Grunberg−Nissan, and Andrade/DIPPR. The changes in the η exp of solvent mixtures rather than in the pure fluids, or deviations from η cal , have been discussed in terms of the molecular interactions and structural effects due to the component molecules. Furthermore, the quantum chemical density-functional theory calculations were used to predict the optimized geometry and total energies of the pure fluids and their binary mixtures.

Viscosity modelling of tri-n-butyl phosphate + benzene mixtures at 308.15K

“…From the experimental values of viscosity (η) and density () of binary mixture: TBP + benzene, the theoretical values of viscosity were estimated by using the following five different mathematical relations of zero adjustable parameters [13][14][15][16].…”

“…The observed deviations of the theoretical dynamic viscosity from the experimental values ( Fig. 1 and Table 3) may be due to the presence of intermolecular interactions between the component molecules of the mixture [13][14][15]. The suitability of these theories based on APD and RMSDr values is as follows…”

“…Hence, it becomes of considerable interest to compute viscosity in liquid mixtures by applying various mathematical models and to identify the suitable relation for the studied liquid mixtures. As a continuation of our effort [11,12], dynamic viscosities of binary system: Tri-n-butyl phosphate (TBP) + benzene are estimated by using different mathematical relations of zero, one and two adjustable parameters [13][14][15][16][17][18][19][20][21] at 308.15K and then comparing the computed values of viscosities with that of the experimentally measured values. Our survey of the literature shows that there have not been any theoretical viscosity data reported for the binary system of TBP with benzene.…”

Excess Thermodynamic Parameters of Binary Liquid Mixtures of Dimethyl Malonate with Isomeric Xylenes at Different Temperatures

“…Therefore, considering the ultrasonic velocities and their related parameters, this system was chosen to under a better knowledge of the nature of interactions between dimethyl malonate and isomeric xylenes. An extensive study on the excess qualities has been reported on the properties of o-xylene with propan-2-ol, butan-2-ol and pentan-2-ol [7], 2-butanol + m-xylene [8], poly(propylene glycol) + toluene/o-xylene/m-xylene/p-xylene [9], isomeric xylenes and diethyl malonate [10], methanol with o, m and pxylenes [11], cyclohexane with toluene, o-xylene and mesitylene [12], xylene and certain alkanols (C4-C8) [13], dimethyl formamide (DMF) with benzene, o-xylene, 1,4-dioxane and tetra hydrofuran [14], 1,4-dioxane with o-, m-, p-xylene, toluene, benzene and mesitylene [15], benzene, toluene, o-, m-, p-xylene and mesitylene with 1,4-dioxane [16], ethylbenzene + p-xylene [17], quinolone + m-xylene [18] and o-xylene with ethyl oleate [19].…”

Refractive Indices and Related Properties for Binary Mixtures of Methyl Acetate and Derivatives of Alkanolamines at Temperature Ranging from 293.15 to 313.15 K

“…27 Chen et al reported the refractive index of an aqueous solution of CdTe quantum dots. 28 As a continuation of our previous research on thermodynamic and optical behavior of some binary liquid mixtures, [29][30][31][32] this paper presents new experimental data of refractive index for two binary systems of methyl acetate (MAc) + methyethanolamine (MEA), and + dimethylethanolamine (DMEA) at T = 293.15, 303.15, and 313.15 K under atmospheric pressure, over the entire mole fraction range. Refractive index measurements are expected to insight both solvent-solvent and solute-solvent interactions.…”