Studies of viscosity and excess molar volume of binary mixtures: 3. 1-Alkanol+di-n-propylamine, and+Di-n-Butylamine (cas 111-92-2) mixtures at 303.15 and 313.15 K
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Add time:08/24/2019 Source:sciencedirect.com
The excess molar volume VE, the viscosity deviation Δη and the excess Gibbs energy of activation ΔG∗E of viscous flow have been investigated from density and viscosity measurements of 15 mixtures of ethanol, propanol, butanol, pentanol, heptanol, octanol and decanol with di-n-propylamine, and di-n-butylamine, and of hexanol with di-n-butylamine over the entire range of mole fractions at 303.15 and 313.15 K. The VE of all the systems are very large negative. Except for the ethanol with di-n-propylamine and di-n-butylamine mixtures, the magnitude of negative deviations in viscosity increases with chain length of alkanol. The results have been explained considering mixed association of alkanol with diamine through OH⋯N bond. The viscosity data have been correlated with the equations of Grunberg and Nissan, Tamura and Kurata, Hind, McLaughlin and Ubbelohde, Katti and Chaudhri, McAllister, Heric, and of Auslaender.
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