Patent ID: 8604133

Claim:
A method for producing a graft copolymer comprising: a step of synthesizing a main chain which is a macroinitiator by polymerizing desired main chain constituent monomers, which are a hydrophobic monomer or a mixture of hydrophobic monomers, by organotellurium-mediated living radical polymerization (TERP); a step of graft-polymerizing desired side chain constituent monomers, which are a hydrophilic monomer or a mixture of hydrophilic monomers, by atom transfer living radical polymerization (ATRP) with a predetermined site of the macroinitiator as an initiation site; and a step of heat treating the obtained graft copolymer for 1 to 5 hours at a temperature from 120° C. to 160° C., wherein: in the produced graft polymer, a main chain moiety mainly consisting of the main chain and a side chain moiety mainly consisting of the side chain are microphase-separated structures; and a surface ratio of the microphase-separated structures is 80% or more.