Refractive Indices Measurements for 1, 4-dioxane + 1-butanol binary mixture at five temperatures

The refractive indices of 1, 4-dioxane (Do) with 1-butanol over the entire composition vary are measured at 298.15, 303.15, 308.15, 313.15 and 318.15 K using Anton Paar Abbemat. The data has been used to evaluate the values of excess refractive indices (nE) of the mixed solvents and the related coefficients are calculated by applying the Redlich Kister polynomial equation. Varied theoretical mixing rules viz., Arago-Biot, Gladstone-Dale, Newton's, Eyring and john, Lorentz-Lorentz, Heller, Eykman, Oster, and Weiner relations are applied to predict refractive index of the liquid mixtures over the entire mole fraction vary of 1,4-dioxane at the five temperatures. The experimental values of refractive indices are in good agreement with all the above relations.