Excess Molar Volumes and Viscosities of Mixtures of Diethylene Glycol Dibutyl Ether with Dialkyl Carbonates at 298.15, 308.15, and 318.15 K |
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Authors: | A. Pal R. K. Bhardwaj G. Dass |
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Affiliation: | (1) Department of Chemistry, Kurukshetra University, Kurukshetra, 136 119, India;(2) Department of Chemistry, Dyal Singh College, Karnal, 132 001, India;(3) M.M. Engineering College, Mullana, Ambala, 133 203, India |
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Abstract: | Excess molar volumes,VEm, and viscosities, , were measured as a function of composition for the binary mixtures of diethylene glycol dibutyl ether+dimethyl carbonate, +diethyl carbonate, and +propylene carbonate at temperatures of 298.15, 308.15, and 318.15 K and atmospheric pressure over the whole range of mixture compositions. From the experimental results, deviations in the viscosity, ln , and excess free energies of activation of viscous flow, G*E, were calculated. The experimental results were correlated using the Redlich–Kister equation. The experimental and calculated quantities were used to analyze the mixing behavior of the components. Furthermore, activation enthalpies, H*, and entropies, S*, of viscous flow were evaluated and their variation with concentration is discussed. |
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Keywords: | binary mixtures dialkyl carbonates excess volume polyethers temperature |
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