The structure of ST-PCPP copolymers was characterized by IR and NMR spectroscopy. A comparison of the spectra of the monomers, copolymers and polystyrene shows, that the reaction between the monomers and ST is a copolymerization. IR spectra of the copolymers show overlapping bands in 3200-2820 cm -1 region corresponding to C-H stretch vibrations.