Abstract

PAEZ, Manuel S. et al. EFFECT OF TEMPERATURE ON THE VISCOSITIES OF DILUTE AQUEOUS SOLUTIONS OF 1,2-HEXANEDIOL, 1,5-HEXANEDIOL, 1,6-HEXANEDIOL AND 2,5-HEXANEDIOL. Rev.Colomb.Quim. [online]. 2008, vol.37, n.1, pp.105-119. ISSN 0120-2804.

Experimental viscosities of dilute aqueous solutions of 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol and 2,5-hexanediol were measured in the temperature range from 283,15 to 308,15 K using Ubbelohde viscometers. The relative viscosity values were adjusted by least-squares to a second order equation to obtain the viscosity B coefficient which has been related to the size and shape of the solute molecule. The temperature dependence of the viscosity B coefficient is discussed in terms of the effect of the position of the hydroxyl groups in the diol molecules on water structure.

Keywords : Viscosity; B coefficient; activation parameters; hexanediols; hydration.

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