Excess Molar Volumes and Viscosities for Binary Mixtures of Propylene Glycol Monomethyl Ether with Methacrylic Acid, Benzyl Methacrylate, and 2-Hydroxyethyl Methacrylate at (298.15, 308.15, and 318.15) K (original) (raw)
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Chinese Journal of Chemistry, 2007
Experimental values of densities () and viscosities () in the binary mixtures of n-octane, n-decane, n-dodecane, and n-tetradecane with octan-2-ol are presented over the whole range of mixture composition at = 298.15 K. From these data, excess molar volume (), deviations in viscosity (Δ), and excess Gibbs free energy of activation Δ * have been calculated. These results were fitted to Redlich-Kister polynomial equations to estimate the binary coefficients and standard errors. Jouyban-Acree model is used to correlate the experimental values of density and viscosity at = 298.15 K. The values of have been analyzed using Prigogine-Flory-Patterson (PFP) theory. The results of the viscosity composition are discussed in the light of various viscosity equations suggested by Grunberg-Nissan, Tamara and Kurata, Hind et al., Katti and Chaudhri, Heric, Heric and Brewer, and McAllister multibody model. The values of Δ ln have also been analyzed using Bloomfield and Dewan model. The experiments on the constituted binaries are analyzed to discuss the nature and strength of intermolecular interactions in these mixtures.
Journal of Molecular Liquids, 2000
t-xcess molar volumes, and viscosities at (298 15, 308.15, and 318 15) K and atmospheric pressure for the binary mixtures of tetraethylene glycol dimethyl ether with methyl acetate, ethyl acetate, and propyl acetate have been measured over the whole mole fraction range From these data, deviations in viscosity, and excess free energies of activation of viscous flow have been calculated. These parameters are used to discuss the molecular interactions between the components of the mixtures Furthermore, activation enthalpies, and entropies of viscous flow have been evaluated and their variation with concentration is discussed. A short comparative study with results for mixtures with esters and polyethers is also presented.
Journal of Chemical & Engineering Data, 2004
This paper reports the density and viscosity of aqueous triethylene glycol dimethyl ether solutions at five temperatures in the range of 303.15 K to 343.15 K and aqueous N-acetylmorpholine solutions at six temperatures in the range of 298.15 K to 343.15 K over the whole concentration range. The results are compared with data published in the literature when available. The excess molar volumes, the partial molar volumes at infinite dilution, the Grunberg-Nissan parameters, and the viscosity deviations were derived.
The Journal of Chemical Thermodynamics, 2008
Densities, q, and viscosities, g, of binary mixtures (N-methylmorpholine + benzene, + toluene, and + cyclohexane) were measured over the whole mole fraction range at T = (298.15, 303.15, 313.15, 323.15) K. Densities and viscosities were used to compute the excess molar volumes V E , viscosity deviation Dg, and the excess free energies of activation for viscous flow DG Ã E. These data have been fitted to Redlich-Kister polynomial equation to derive the coefficients and estimate the standard deviation values. A discussion on these quantities in terms of molecular interactions is reported.
The Journal of Chemical Thermodynamics, 2007
Densities and dynamic viscosities for methanol or ethanol with water, ethyl acetate, and methyl acetate at several temperatures T = (293.15, 298.15, and 303.15) K have been measured over the whole composition range and 0.1 MPa, along with the properties of the pure components. Excess molar volumes, viscosity deviations, and excess free energy of activation for the binary systems at the above-mentioned temperatures, were calculated and fitted to the Redlich-Kister equation to determine the fitting parameters and the root-mean-square deviations. UNIQUAC equation was used to correlate the experimental viscosity data. The UNIFAC-VISCO method and ASOG-VISCO method, based on contribution groups, were used to predict the dynamic viscosities of the binary mixtures.
J Chem Eng Data, 2004
Excess molar enthalpies and excess molar volumes of binary mixtures containing ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, or poly(ethylene glycol)s (PEG200, PEG300, PEG400, and PEG600) + benzyl alcohol were determined at 308.15 K and at atmospheric pressure using a flow microcalorimeter and a digital density meter. Results were fitted to the Redlich-Kister polynomial to estimate the binary interaction parameters. The results are interpreted in terms of molecular interactions between the components.
Theoretical and Experimental Methods for Study of Binary mixtures viscosity at T= 303.15
2018
Molecular interactions in binary mixtures composed of a xylene and selected 1-butanol 1-pentanol, 1-hexanol, 1-heptanol and 1-octanol was investigated by measuring the viscosity at T= 303.15 K. From experimental data, viscosity deviation was calculated. Values of viscosity deviations for all binary mixtures are negative and increase with increase of alcohols chain length. Obtained data were interpreted based on the type and magnitude of the physico-chemical interactions in the binary liquid systems. free volume theory was applied to correlate the viscosities of binary mixtures and correlated values by this model were good enough and obtained data were within the uncertainty region.Keywords: Viscosity; xylene; 1-Alkanol; free volume theory