Kinematic Viscosities of Binary Liquid Mixtures of 2-Butanone with 1,2-Propanediol |
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Authors: | Matteo Manfredini Andrea Marchetti Simona Sighinolfi Lorenzo Tassi Alessandro Ulrici Moris Vignali Claudia Zucchi |
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Institution: | (1) Department of Chemistry, University of Modena and Reggio Emilia, via G. Campi, 183-41100 Modena, Italy;(2) Department of Biomedical Sciences, University of Modena and Reggio Emilia, via G. Campi, 180-41100 Modena, Italy;(3) Department of Agricultural Sciences, University of Modena and Reggio Emilia, via J. F. Kennedy, 17-42100 Reggio Emilia, Italy |
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Abstract: | Kinematic viscosities of the binary 2-butanone (1) + 1,2-propanediol (2) solvent system have been measured for mixtures covering the whole miscibility range expressed by 0 x
i 1, at 19 temperatures in the range –10 t/°C 80. The measured values have been used to test empirical equations that express the kinematic viscosities as functions of the composition and temperature. Excess kinematic viscosities (E) have also been calculated. Sign and magnitude of these quantities are discussed in terms of type and nature of specific intermolecular interactions. Furthermore, derived quantities such as thermodynamic parameters of viscous flow (G, H and S), are analyzed on the basis of Eyring's model. All the investigated excess mixing properties indicate the probable existence of stable two-component adducts in this binary solvent system. |
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Keywords: | Data kinematic viscosity binary mixtures 2-butanone 1 2-propanediol excess viscosities temperature dependence free energy enthalpy and entropy of activation |
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