Excess molar volumes and viscosities for binary mixtures of dipropylene glycol monomethyl ether and of dipropylene glycol monobutyl ether with 1-propanol and 2-propanol at 298.15 K

Department of Chemistry, Kurukshetra University, Kurukshetra-136 119, India

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Manuscript received 2 September 2002, revised 12 March 2003, accepted 16 April 2003

Excess molar volumes (V^E_m) and viscosities (ɳ) have been measured as a function of composition for binary liquid mixtures of dipropylene glycol monomethyl ether and of dipropylene glycol monobutyl ether with 1-propanol and 2-propanol at 298.15 K and atmospheric pressure. The V^E_m, values for each of the mixture studied are negative over the whole composition range. The V^E_m, results have been used to estimate the partial molar volumes of the components at infinite dilution. From the experimental data, the deviation in ɳ from ∑x_ilnɳ_i have been calculated. The results are discussed as a basis to understand some of the molecular interactions present in the mixtures. The viscosity data have been correlated with the equations of McAllister, Heric, and Auslaender.