The effect of ferrocene on the synthesis of graft poly(dimethylsiloxanes) by radical copolymerization of a polysiloxane containing terminal trivinylsiloxy groups with styrene. The backbone in the synthesized graft copolymers is formed by a linear poly(dimethylsiloxane) with a part of its vinyl groups involved in grafting polystyrene chains. The products were studied by gel permeation chromatography, ¹Н NMR spectroscopy, and optical microscopy.