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Thermodynamic Study of Poly(vinyl pyrrolidone) in Water/Dimethyl Sulfoxide Solutions by Viscometry

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Abstract

In this work, the intrinsic viscosities of poly(vinyl pyrrolidone) with a molar mass of 58 kg⋅mol−1 were measured in water–dimethyl sulfoxide solutions at temperatures from (298.15 to 318.15) K. The expansion factors of the polymer chains were calculated from the intrinsic viscosity data. The thermodynamic parameters (entropy of dilution parameter, the heat of dilution parameter, theta temperature, polymer–solvent interaction parameter and second osmotic virial coefficient) were derived by the temperature dependence of the polymer chain expansion factor. The thermodynamic parameters indicate that mixtures of water/dimethyl sulfoxide become poorer solvents for poly(vinyl pyrrolidone) as the temperature is increased. Also, the thermodynamic parameters indicate that water/dimethyl sulfoxide mixtures become better solvents for poly(vinyl pyrrolidone) by increasing the volume fractions of dimethyl sulfoxide.

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  1. Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran

    Abbas Mehrdad

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  1. Abbas Mehrdad
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Correspondence to Abbas Mehrdad.

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Mehrdad, A. Thermodynamic Study of Poly(vinyl pyrrolidone) in Water/Dimethyl Sulfoxide Solutions by Viscometry. J Solution Chem 41, 766–776 (2012). https://doi.org/10.1007/s10953-012-9829-0

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  • DOI: https://doi.org/10.1007/s10953-012-9829-0

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