Thermodynamic modelling of density and viscosity data of binary mixtures of haloarenes with cyclohexane

Densities (rho) and dynamic viscosity (eta) of the binary mixtures haloarenes (2-chlorotoluene (o-CT) or 4-chlorotoluene (p-CT) or 1,3-dichlorobenzene (m-DCB)) (1) + cyclohexane (2) were experimentally measured at T = (298.15-318.15) K and atmospheric pressure. The excess molar volume (V-m(E)) and deviation in dynamic viscosity (Delta eta) were calculated using rho and eta data. The V-m(E) values for o-CT or p-CT or m-DCB (1) + cyclohexane (2) are negative at all compositions. The V-m(E) is a temperature dependent property. The V-m(E) values decreases as temperature rise. The V-m(E) values were analysed using Prigogine-Flory-Patterson (PFP) theory too. The Delta eta values are negative at all compositions. The viscosity increases with the rise in temperature because of the opening of interstitial voids in mixture. Singh equation and Bloomfield and Dewan (BFD) model were applied to predict eta and Delta eta values. The viscosities of binary mixtures have been predicted using different correlations.

Automated summary

This study experimentally measured the densities and dynamic viscosity of binary mixtures of haloarenes (2-chlorotoluene, 4-chlorotoluene, 1,3-dichlorobenzene) + cyclohexane at different temperatures and atmospheric pressure. The excess molar volume and deviation in dynamic viscosity were calculated and analyzed using various theories and models. The viscosity of the mixture increased with temperature due to the opening of interstitial voids. Predictions of viscosity and viscosity deviation were made using different correlations.