Temperature and Composition Dependence of the Density and Viscosity of Binary Mixtures of {1-Butyl-3-methylimidazolium Thiocyanate+1-Alcohols}

Density and viscosity were determined for binary Mixtures containing ionic liquid 1-butyl-3-methylimidazolium thiocyanate ([BMIM][SCN]) and 1-alcohol (methanol, ethanol, and 1-propanol) in a temperature range (298.15 to 348.15) K and ambient pressure. The temperature dependence of density and viscosity for these systems can be described by an empirical second-order polynomial and by the Vogel-Fucher-Tammann equation, respectively. Excess molar volumes and viscosity deviations were calculated and correlated by the Redlich-Kister polynomial expansions. Volume expansivity and excess volume expansivity were described in function of temperature and composition. The polynomial correlations describe the variation of density and viscosity with composition. Comparison of the results for three binary systems elucidates the influence of 1-alcohol carbon chain length oil their physical properties.