Diffusion in Liquid Sulfur

摘要

Diffusion coefficients have been measured in liquid sulfur over the range 120deg;Cmdash;320deg;C. Two varieties of sulfur, both treated to remove organic impurities, were used. No essential difference was found between them. The break in the diffusion rate occurs at a lower temperature than does the break in the viscosity curve, and the total drop in diffusion rate is much smaller than the rise in viscosity. The effect of added impurity is also less important for diffusion than for flow. This is attributed to the smaller effective moving segment in molecular motion.