Viscosity of biniary mixtures. III. Tri nbutylamine with alkanes and monoalkylamines at 303.15 and 313.15 K
Abstract
Viscosities η of seven binary systems of npropylamine, nbutylamine, nhexylamine, noctylamine, nhexane, noctane, and isoctane (2,2,4trimethylpentane) with tributylamine have been measured at 303.15 and 313.15 K with an Ubbelohde suspendedlevel viscometer. Based on Eyring's theory, values of excess Gibbs energy of activation δG ^{ *E } of viscous flow have been calculated. Deviations of viscosities from linear dependence on the mole fraction and values of δG ^{ *E } are attributed to the Hbonding and to the size of alkylamine and alkane molecules. The free volume theory of PrigogineFloryPatterson in combination with work by BloomfieldDewan has been used to estimate the excess viscosity δ ln η and the terms corresponding to enthalpy, entropy, and free volume contributions for the present binary mixtures.
 Publication:

International Journal of Thermophysics
 Pub Date:
 September 1992
 DOI:
 10.1007/BF00503908
 Bibcode:
 1992IJT....13..801O