A synthetic route for graftcopolymers, in which the poly(styrene-co-2-acetoxy-2-(4-vinylphenyl)propane) was synthesized via a radical pathway is described. The resulting macroinitiator was used to initiate the cationic homopolymerization of isobutylene and the cationic copolymerization of isobutylene with isoprene. The resulting polymers were characterised with common methods such as H-1/C-13-NMR, IR and GPC.