In this presentation,the variations of electric conductivity are reported in the process of RAFT(PMAA-CPDB as chain transfer agent)and random precipitation copolymerization of methacrylic acid(MAA)with acrylamide,4-vinyl pyridine,styrene and methyl methacrylate in ethanol.In general,RAFT copolymerization exhibited much high conductivity and easy to form the particles relative to the random copolymerization.