| 摘要 |
PROBLEM TO BE SOLVED: To provide a reversible addition cleavage chain transfer (RAFT) polymerization method and a RAFT agent.SOLUTION: A polymer preparation method includes a step of polymerizing one or more ethylenic unsaturated monomers under the control of RAFT agents of formula (II) or (III). In formulae (II) and (III), Y is a Lewis base part; Yis a n-valent Lewis base part; X is O or NR; Ris alkyl, alkenyl, alkynyl, aryl, heteroaryl, or the like; Y or Y, together with N, may form a heterocyclic ring; m is an integer of 1 or greater; n is an integer of 2 or greater; Ris a m-valent radical leaving group and initiates free radical polymerization of one or more ethylenic unsaturated monomers; R is a free-radical leaving group and forms Rinitiating free-radical polymerization of one or more ethylenic unsaturated polymers. |
