METHOD FOR PRODUCING BLOCK COPOLYMER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a (vinyl polymer-polylactone)-based block copolymer, by using a complex-based polymerization initiator. SOLUTION: In this method for producing the (vinyl polymer-polylactone)- based block copolymer which is composed of (A) a block segment consisting mainly of the vinyl-based polymer and (B) another block segment consisting mainly of the polylactone, a polymer which forms the block segment (A) is produced by applying living radical polymerization by the use of the complex- based polymerization initiator not containing halogen, and finally the block copolymer composed of the block segment (A) and the block segment (B) is obtained.