(382v) Viscometric Properties of Binary Mixtures of Dimethyl Carbonate with Alcohols at T = (288.15 - 308.15)

Viscosity and derived properties of liquid mixtures have been used for engineering applications manly in process involving fluid flow and mass and heat transfer. In the present study, viscosities and densities were measured over the whole concentration range for the binary liquid mixtures of {dimethyl carbonate (DMC) + ethanol, or + 1-propanol, or + 1-butanol, or + 1-pentanol} at different temperatures T = (288.15 - 308.15) K and ambient pressure. These values have been used to calculate the deviation in viscosity and excess Gibbs energy of activation of viscous flow. These properties were fitted to the Redlich-Kister polynomial equation. The viscosities and densities of pure components and their solutions were measured using a rotational viscometer/densimeter manufactured by Anton Paar (Model Stabinger SVM 3000). In addition, the viscosity results were correlated to the equations of Grünberg-Nissan, Hind et. al., Heric-Brewer, Van der Wyk and Katti-Chaudhri. For all systems studied, the values of deviation in viscosity and excess Gibbs energy of activation of viscous flow were negative. The results obtained were discussed in terms of intermolecular interactions, particularly hydrogen-bonding interactions between like and unlike molecules.