Prediction of viscosities and COSMO-RS analyses in binary mixtures of N,N-dimethylformamide with acetone

摘要

Experimental viscosities, , for pure N,N-dimethylformamide (DMF) and acetone (ACT) and their binary mixtures are measured over the whole composition range as a function of temperature between 298.15 and 313.15K. The deviations in viscosity, , Gibbs free energy of activation G, entropies S*, enthalpies H of activation of viscous flow have been calculated. The determination of excess molar volumes, V-E, was calculated from the experimental viscosities for the binary mixtures. The conductor-like screening model is applied to interpret the intermolecular forces. The sigma-profile is computed for the N,N-DMF and ACT with conductor-like screening model for real solvents. The experimental results were found to be in good agreement with the theoretical predictions. Moreover, viscosity data were calculated from the theoretical equations of Grunberg and Nissan, Hind et al. and Wilke for the entire systems. All results obtained were averaged experimentally and theoretically in terms of average deviations.