The structure of ST-ICAA 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 trisubstituted ethylenes and styrene is a copolymerization. IR spectra of the copolymers show overlapping bands in 3300-2700 cm were measured by GPC in THF. According to GPC analysis the copolymers had weightaverage molecular masses 24.8 to 64.3 kD (Table ).