Dynamic Light Scattering Study of the Liquid Ethylene Glycol–Dimethylsulfoxide System

The liquid ethylene glycol–dimethylsulfoxide system is studied by means of dynamic light scattering. Scattered light spectra and the autocorrelation functions of intensity are obtained, and relaxation times, self-diffusion coefficients, and hydrodynamic radii of associates are calculated. The results are due to solvophobic effects and micro phase separation, as is confirmed by liquid-phase separation within a certain range of temperatures and concentrations.