Small Angle X-Ray Scattering from Tertiary-Butyl Alcohol-Water Mixtures

Abstract

Small angle x-ray scattering measurements have been made on a number of t-butanol-water mixtures. The scattering is concentration dependent and has a maximum intensity for the solution with 0.11 mole fraction of alcohol. The zero angle scattering from this solution is temperature dependent and increases by a factor of 2.5 when the temperature changes from 5° to 56°C. Theoretical zero angle intensities, calculated from thermodynamic data in terms of the Kirkwood and Buff solution theory, were found to be in agreement with the experimental results. Thermodynamic data were also used to show that the solutions that give rise to appreciable small angle scattering also tend to form clusters of like molecules.