Abstract
Excess volumes and viscosities have been determined for DMSO + n-hexanol, + n-heptanol, + n-octanol, and + n-decanol at 40°C. The excess partial molar volumes V E1 , changes in viscosities Δη, the parameter d of the Grunberg and Nissan expression, and excess Gibbs free energies of activation of flow ΔG E* have been calculated from the experimental data. All the excess volumes are positive over the whole composition range, with VE increasing with the length of the alkanol chain. VE results are discussed in terms of disruption of alkanol multimers, weakening of interactions between DMSO molecules, influence of interactions between components, and structural effects. The VE data have also been analyzed using the Prigogine-Flory-Patterson expression which separates VE into three contributions. Correlation is also observed between the sign of Δη and VE for all the mixtures studied.
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Dewan, R.K., Gupta, S.P. & Mehta, S.K. Excess volumes and viscosities of mixtures of dimethylsulfoxide with normal alcohols at 40°C. J Solution Chem 18, 13–22 (1989). https://doi.org/10.1007/BF00646079
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DOI: https://doi.org/10.1007/BF00646079