Abstract
Excess molar volumes VmE for binary liquid mixtures of n-alkoxyethanols or polyethers + 2-pyrrolidinone or N-methyl-2-pyrrolidinone have been measured with a continuous dilution dilatometer at 298.15 K and atmospheric pressure as a function of composition. The alkoxyethanols are diethylene glycol monomethylether, 2-(2-methoxyethoxy) ethanol, CH3(OC2H4)2OH; diethylene glycol monoethylether, 2-(2-ethoxyethoxy) ethanol, C2H5(OC2H4)2OH; and diethylene glycol monobutylether, 2-(2-butoxyethoxy) ethanol, C4H9(OC2H4)2OH; whereas the polyethers are diethylene glycol dimethylether, bis(2-methoxyethyl)ether, CH3(OC2H4)2OCH3; diethylene glycol diethylether, bis(2-ethoxyethyl)ether, C2H5(OC2H4)2OC2H5; and diethylene glycol dibutylether, bis(2-butoxyethyl)ether, C4H9(OC2H4)2OC4H9. In all mixtures the excess molar volumes are negative and symmetric across the entire composition range. The excess volumes are fitted to the Redlich–Kister polynomial equation to obtain the binary coefficients and the standard errors. The experimental results have also been discussed on the basis of IR measurements.
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Pal, A., Kumar, A. Excess Volumetric and Spectroscopic Properties of Mixtures of Some n-Alkoxyethanols and of Some Polyethers with 2-Pyrrolidinone and N-Methyl-2-Pyrrolidinone at 298.15 K. J Solution Chem 34, 917–927 (2005). https://doi.org/10.1007/s10953-005-6256-5
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DOI: https://doi.org/10.1007/s10953-005-6256-5