Experimental measurement and modelling of viscosity of the binary systems pyridine or nicotine with polyethylene glycols at T= (288.15–333.15) K. New UNIFAC–VISCO and ASOG–VISCO interaction parameters

Viscosities of 1-Hexyl-3-methylimidazolium Tetrafluoroborate and Its Binary Mixtures with Dimethyl Sulfoxide and Acetonitrile

“…It can be noticed that the predictive model underestimates the experimental data while the correlative Grunberg–Nissan model overestimates the data. In any case, for both systems the predictive model gives good results, almost the same as with correlative models, especially at lower temperatures, as other authors have observed in the literature. , Consequently, the UNIFAC–VISCO model in its present form can be accurate for the evaluation of viscosity, especially around room temperature.…”

“…It can be noticed that the predictive model underestimates the experimental data while the correlative Grunberg−Nissan model overestimates the data. In any case, for both systems the predictive model gives good results, almost the same as with correlative models, especially at lower temperatures, as other authors have observed in the literature 29,68. Consequently, the UNIFAC−VISCO model in its present form can be accurate for the evaluation of viscosity, especially around room temperature.■ CONCLUSIONSThe experimental values of viscosity for the binary mixtures of[C 6 mim][BF 4 ] + DMSO and [C 6 mim][BF 4 ] + ACN over the entire composition range were determined at eight temperatures (T = 293.15, 298.15, 303.15, 313.15, 323.15, 333.15, 343.15, and 353.15 K) and under atmospheric pressure (p = 0.1 MPa).…”

“…The UNIFAC–VISCO model is a group contribution method developed by Chevalier et al − to predict the viscosity of liquid mixtures. Briefly, the viscosity of a binary mixture is calculated as follows where V m is the ideal molar volume of the mixture calculated with the following equation: …”

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

“…Pd-catalyzed reactions (the importance of these can be seen in the 2010 Nobel prize award for their discovery) have also been carried out in PEG under both homocatalytic and heterocatalytic conditions where Pd is immobilized onto a porous silica material. − PEGs have also been successfully used as components in deep eutectic solvents. − Despite all of these successes, there are only limited experimental and theoretical studies on the dynamics of neat PEG. − Experimental physicochemical properties of PEGs are needed to further this effort. In this respect, densities and viscosities have been repeatedly reported for several polydisperse PEGs usually as part of studies on binary mixtures involving polydisperse PEGs. − The polydisperse PEGs are composed of mixtures of PEG oligomers with approximately a Gaussian mole fraction distribution around the mean chain length. ,, It is likely that the exact mole fraction distribution may vary from vendor to vendor and possibly even from batch to batch. Unfortunately, a composition analysis of polydisperse PEGs is typically not included in the above cited studies.…”

Thermodynamic Excess Properties and Intermolecular Interaction Using Fourier Transform Infrared for the Dodecylbenzenesulfonic Acid-Acetone Binary Liquid Mixture

“…In addition, the negative values of surface tension are reduced with increasing temperature. As stated in the literature, the molar excess Gibbs free energy of activation had a vital role in the study of the molecular interaction (Bajić, et al, 2013a;2013b). For…”