Yoshihisa Inoue1, Krzysztof Matyjaszewski1
1Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213
Tóm tắt
AbstractThe synthesis of block copolymers consisting of a polyethylene segment and either a poly(meth)acrylate or polystyrene segment was accomplished through the combination of postmetallocene‐mediated ethylene polymerization and subsequent atom transfer radical polymerization. A vinyl‐terminated polyethylene (number‐average molecular weight = 1800, weight‐average molecular weight/number‐average molecular weight =1.70) was synthesized by the polymerization of ethylene with a phenoxyimine zirconium complex as a catalyst activated with methylalumoxane (MAO). This polyethylene was efficiently converted into an atom transfer radical polymerization macroinitiator by the addition of α‐bromoisobutyric acid to the vinyl chain end, and the polyethylene macroinitiator was used for the atom transfer radical polymerization of n‐butyl acrylate, methyl methacrylate, or styrene; this resulted in defined polyethylene‐b‐poly(n‐butyl acrylate), polyethylene‐b‐poly(methyl methacrylate), and polyethylene‐b‐polystyrene block copolymers. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 496–504, 2004
