Preparation of New Type of Block Copolymer of p-Methoxystyrene and Cyclohexene Oxide by Radical/ Cation Transformation Polymerization

摘要

Block copolymers of p-methoxystyrene(MOS) and cyclohexene oxide(CHO) were effectively prepared by radical polymerization of p-mcthoxystyrene in the presence of Ph_2I~+PF_6~- and CHO. The block copolymerization is ascribable to the transformation of growing ends from radical to cationic species during the propagation step.