Molecular interaction in binary mixtures of 1,4-butanediol+picolines: Viscometric approach


Kolla, Narendra ; Srinivasu, J V; Dey, Ranjan ; Rao, G Srinivasa; Rao, Subba


The viscosity (h) of {1,4-butanediol (i) + α-, or β-, or γ-picoline (j)}binary mixtures have been measured and reported at 303.15, 308.15, 313.15 and 318.15 K over the entire range of composition. Viscosity deviation (h) and excess Gibbs energy of activation of viscous flow (∆G*E) based on Eyring’s theory have been evaluated and the results fitted to the Redlich-Kister equation. The ∆h values are observed to be negative over the entire range of composition for (1,4-butanediol+α-picoline), (1,4-butanediol+β-picoline) and (1,4-butanediol+γ-picoline) systems. The experimental viscosity data have been compared with some well-known equations of Frenkel, modified Frenkel approach and predictive ones like McAllister, Grunberg-Nissan, Hind et al., Tamura Kurata and Katti-Chaudhri. The effects of molecular sizes and shapes of the component molecules on the molecular interactions present thereof in the mixtures have been discussed.



Solution chemistry, Thermodynamic properties, Transport properties, Viscosity, 1,4-butanediol, Picoline, Excess gibbs energy of activation, Molecular interaction, Deviation in viscosity

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