Two novel organotin monomers, (N-tri-n-butyltin) maleimide and m-acryloylamino-(tri-n-butyltin benzoate), were synthesized. Copolymerization of these two monomers with styrene was carried out in the bulk at 65 degrees C using asobisisobutyronitrile as the free radical initiator. The monomers and copolymers were characterized by elemental analysis; the molecular weights of the copolymers were determined by GPC, solubility, IR, and H-1-NMR spectral studies. The antibacterial activities of the synthesized organotin monomers and copolymers toward various types of bacteria were also reported.