Synthesis of Polythiourethane-Based Macro Chain Transfer Agents and Their Block Copolymers with Vinyl Monomers via Controlled Multimode Polymerization NagaiAtsushi HamaguchiTakaaki KikukawaKiyoshi KawamotoEiichi EndoTakeshi 2007 Synthesis of Polythiourethane-Based Macro Chain Transfer Agents and Their Block Copolymers with Vinyl Monomers via Controlled Multimode Polymerization