Study on solution–solution interactions prevailing in some liquid mixtures by volumetric, viscometric and acoustic measurements

Abstract

The densities and viscosities of eight ternary mixtures of 1,4-dioxane, N,N-dimethylformamide and monoalkanols; methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, amyl alcohol (1-pentanol) and iso-amyl alcohol are determined over the entire range of composition at 298.15 K. From the experimental observations, the viscous synergy and antagonism, synergic and antagonic interaction index are derived by the equations developed by Kalentunc-Gencer and Peleg and Howell, respectively. A power factor, F_η , has also been introduced here. Also, the speeds of sound of these ternary mixtures have been measured over the whole composition range at the same temperature and thus, the isentropic compressibility and excess isentropic compressibility have been evaluated from the experimental data. The results are discussed and interpreted in terms of molecular package and specific interaction predominated by hydrogen bonding.

Keywords:

• viscous antagonism
• viscosity deviations
• excess molar volumes
• isentropic compressibilities