| 摘要 |
PROBLEM TO BE SOLVED: To provide a chain transfer agent with which various kinds of block copolymers are produced without being restricted by kinds of raw material monomers, with which a polymerization condition of the block copolymers is easily controlled, and which is obtained by a comparatively simple synthetic method, and to provide a method for producing the block copolymers.SOLUTION: A chain transfer agent is used for a reversible addition cleavage chain transfer polymerization, has a structure represented by general formula (1) at the end thereof, and is a di- or tri-thiocarbonate in which the structure is bound to a carbon atom or to a sulfur atom. In a method for producing a block copolymer, at least one of an acrylic ester, a methacrylic ester, and an aromatic vinyl compound is subjected to the reversible addition cleavage chain transfer polymerization by using the chain transfer agent. In formula (1), Ris a hydrogen atom or a 1-6C alkyl group. |
