Synthesis of novel types of graft copolymers by a 'grafting-from' method using ring-opening polymerization of lactones and lactides

摘要

Polystyrene and polystyrene-Wocfc-poly(methyl methacrylate) densely grafted with poly(ε-caprolactone) or poly(DL-lactide) in the benzene rings were synthesized by a "grafting-from" method using hydroxylated precursors of the above styrene polymers as macroinitiators of the ring-opening polymerization of appropriate monomers. The poly(ε-capro-laetone) grafts of the polystyrene-graft-poly(ε-caprolactone) copolymer were lengthened with poly(methyl methacrylate) by atom transfer radical polymerization. All the synthesized graft copolymers were characterized by ~1H and ~(13)C NMR spectroscopy and by size exclusion chromatography.