Interaction studies in binary liquid mixtures of ether and alcohols at different temperatures

Abstract

Densities (<em>ρ</em>), speeds of sound (<em>µ</em>) and viscosities (<em>η</em>) of binary liquid mixtures of triethylene glycol monomethyl ether and alcohols (1-hexanol, 1-octanol, and 1-decanol) and those of pure liquids at 293.15, 298.15, 303.15 and 308.15 K and atmospheric pressure are reported over the entire composition range. Using the experimental results, excess molar volumes (<em>V</em><img src='http://www.niscair.res.in/jinfo/em.gif' border=0>), isentropic compressibilities (<em>κ</em>_s), deviation of isentropic compressibilities (∆<em>κ</em>_s), deviation of the speeds of sound (∆<em>u</em>) and viscosity deviations (∆<em>η</em>) have been calculated to understand the intermolecular interactions between the component molecules. These excess properties have been correlated with composition using the Redlich-Kister polynomial equation. The positive values of <em>V</em>^E_m and ∆<em>κ</em>_s show that volume expansion takes place on addition of alcohols to the ether. The negative values of ∆<em>u </em>and ∆<em>η</em> also indicate the presence of weak intermolecular forces which follow the order: 1-hexanol > 1-octanol > 1-decanol.