A NON-LINEAR CORRELATION MODEL FOR THE RELATIVE PERMITTIVITY OF TERNARY AMPHIPROTIC (SOLVENT) MIXTURES

Relative permittivities (epsilon) were determined for ternary ethane-1,2-diol (component 1)/2-methoxyethanol (component 2)/water (component 3) mixtures at five temperatures ranging from 5 to 25-degrees-C and over the mole fraction composition range 0 less-than-or-equal-to X(i) less-than-or-equal-to 1. The data have been fitted to a model equation that could be useful for predictive epsilon calculations. From the measured epsilon values, the excess relative permittivity epsilon(E) has been evaluated in order to test for three-component adducts. The values of epsilon(E) have been found to be negative for all the ternary mixtures under all the experimental conditions, which suggests a strong interaction network through hydrogen bonding, although evidence for a discrete three-component adduct was not forthcoming.