Densities, Viscosities, and Refractive Indices of Dimethyl Carbonate + 1-Hexanol/1-Octanol Binary Mixtures at Different Temperatures

Abstract

The densities, viscosities, and refractive indices for the binary mixtures of dimethyl carbonate (DMC) + 1-hexanol/1-octanol were measured at atmospheric pressure and temperature of 293.15, 298.15, 303.15, 308.15, 313.15, 318.15, and 323.15 K over the whole concentration range. Different thermodynamic, transport, and optical properties, such as excess molar volume, partial molar volume, thermal expansion coefficient, isothermal coefficient of pressure excess molar enthalpy, activation energy of flow, excess refractive index, and electronic polarizability were obtained from the experimental data. The results were analyzed in terms of specific molecular interactions and mixing behavior between mixture components with taking into considerations the effect of temperature. Moreover, the thermophysical properties were examined with predictive and correlative equations. The quality of the predictions for the studied systems was evaluated by measuring the deviations and drawing the comparison plots.

Excess Molar Volume and Viscosity Deviation of [C2mim][NTf2]/[C4mim][NTf2] + DMC/DEC

“…The deviations of the experiment and literature values are calculated and listed in Table . From Table , for [C 2 mim]­[NTf 2 ], the absolute density deviations are less than 0.03% in the literature − except for those in ref (but the absolute deviations are still less than 0.14%); the absolute viscosity deviations are less than 6.6% in the literature. ,, For [C 4 mim]­[NTf 2 ], the absolute density deviations are higher than 0.04% and less than 0.18% in the literature; − the absolute viscosity deviations are higher than 1.2% and less than 4.1% in the literature. , For DMC, the absolute density deviations are less than 0.10% in the literature − except one point, 0.139%; the absolute viscosity deviations are less than 10% in the literature ,− except for one point, 15.556% . For DEC, the absolute density deviations are less than 0.03% in the literature ,− except for two points, 0.132% and 0.115%; the absolute viscosity deviations are less than 2.4% in the literature. ,− …”

“…The density and viscosity of the pure compounds [C 2 mim]­[NTf 2 ], [C 4 mim]­[NTf 2 ], DMC, and DEC from this study and available from the literature are shown in Table . − ,− The measured values of the binary mixtures are listed in Tables and . All of the values of the density and viscosity were measured at atmospheric pressure ( p = 101.3 kPa).…”

“…DMC and DEC have also been used in many fields as environmentally benign chemicals, such as lithium batteries, water emulsifiable formulations, synthesis of chemicals, and as solvents for extractive, natural, synthetic resin, or polymers, etc. The binary mixtures of DMC or DEC with other solvents have also been studied by some groups. − …”

Thermophysical Study of Binary Systems of tert-Amyl Methyl Ether with n-Hexane and m-Xylene

“…The analysis of these molecular interactions, generated due to deviation of components properties in solution from those in pure forms, can describe the solution behavior. 15 Therefore, the molecular associations observed at different temperatures are significant for development of molecular models for predicting the solution behavior. Moreover, the thermophysical data for nonelectrolyte liquid−liquid mixtures can provide valuable information for designing different industrial operations such as heat transfer, mass transfer, and separation processes.…”

“…The investigation on thermophysical properties for a binary blend at different temperatures would reveal the type and nature of involved molecular interactions. The analysis of these molecular interactions, generated due to deviation of components properties in solution from those in pure forms, can describe the solution behavior . Therefore, the molecular associations observed at different temperatures are significant for development of molecular models for predicting the solution behavior.…”