English Abstract

Various Types of Living Polymerization and Block Copolymer Katsuhiko Takenaka Department of Chemistry, Nagaoka University of Technology Niigata,Japan Nippon Gomu Kyokaishi,(2003),76(8), 274-280 General Review in Japanese. Abstract The characteristics of various types of living polymerization such as free-radical, cationic, anionic, coordination and ring-opening metathesis polymerizations and the formation of block copolymers by sequential monomer addition method were reviewed. In the case of free-radical polymerization, three individual methods such as nitroxide-mediated polymerization (NMP), atom-transfer radical polymerization (ATRP) and reversible addition fragmentation chain-transfer (RAFT) processes were compared concerning with the reaction condition and the kinds of applicable monomers. For anionic processes, principle mechanisms of immortal polymerizations and group transfer polymerization (GTP) as well as classical living anionic polymerization were reviewed. The unique feature of ring-opening metathesis polymerization (ROMP) was also described. Keywords: Anionic living polymerization,Cationic living polymerization, Controlled radical polymerization,Block Copolymerization, Ring-opening metathesis polymerization, Group transfer polymerization

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