The synthesis of a new monomer para-aminophenyl cyclopropyl methacrylate (APCM) was carried out, its radical copolymerization with styrene was investigated and some regularities of the process were studied. Its radical copolymerizations with styrene were carried out and the resulting copolymers were established in the structures. Based on the IR-NMR and UV spectra, it was found that the copolymerization process of para-aminophenyl cyclopropyl methacrylate proceeds through the double bond, and the substituents, para-aminophenyl cyclopropyl fragment, remain in the side macrochain. The values of the relative activity constants of monomer were determined and the parameters Q and e were calculated according to Alfrey and Pras. The copolymerization constants of the specified compound (r1) with styrene (r2) calculated by the Feinman-Ross method are r1=0.45, r2=0.22, the values of parameters Q and e: Q=0.024 and e=-2.316, respectively. It was revealed that the resulting copolymer has a sufficiently high biomedical activity, which opens the possibility of using this copolymer as a bactericide