Mobility of additives in ethylene polymers

Summary Diffusion rate of different additives was studied in ethylene polymers. The measured values were evaluated on the basis of the free-volume theory. It was concluded from the results that the rate of diffusion is primarily determined by the fractional free-volume of the noncrystalline phase of the polymer, as well as the specific volume of the additive.This work was supported by Grant No. OTKA 1/2-1790 from the National Scientific Research Foundation of Hungary.