Abstract
Experimental densities, viscosities, and heat capacities were measured over the entire mole fraction range for the binary mixture of 1,4-butanediol + water mixtures over a temperature range. From these data, excess molar volumes, deviations in viscosity, and excess molar heat capacities were computed. The VE, Δη, and were fitted to the Redlich−Kister equation using a multiparametric nonlinear regression analysis. Estimated coefficients and standard error values for the mixing quantities are presented. VE is negative for 1,4-butanediol + water mixtures at all temperatures and over the entire compositions. Δη vs x1 shows sinusoidal shape. The values of are positive in the whole range of mole fraction and increase with raising temperature at constant x1. The curve has large maximum values located in the x1 = 0.23.
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