Synthesis of A-B Type Block Copolymers Using 1-Phenylethyl Dithiobenzoate as RAFT Agent

The synthesis of homopolymers and diblock copolymers by adding dithioester as chain transfer agent were performed. A series of monomers were polymerized by Reversible Addition-Fragmentation Chain Transfer(RAFT) polymerization. All of these homopolymers have the controlled polymerization characteristics, PDI is narrow(1.08~1.30). The effect of the molar ratio of chain transfer agent to initiator on polymerization was discussed. The diblock copolymers were gotten by addition of the secong monomer. These copolymers have the characteristics of the controlled/living radical polymerization.