Radio-frequency gas discharge is a universal method for modifying materials of various physical nature - from dielectrics to metals, including powders, which serve as dispersed fillers when creating polymer composite materials. The issue of creating an interfacial layer at the matrix-filler boundary is an important and urgent task, which makes it possible to obtain monolithic products without defects with improved physical and mechanical properties. The work is devoted to the study of the effect of processing various fillers in a gas discharge on the properties of composites.