Authors Ibrahim, S. ; Voit, B.
Title Synthesis and characterization of well-defined block copolymers by combing controlled radical and cationic polymerization
Date 17.03.2009
Number 17622
Abstract A facile synthetic strategy for well-defined poly(ethyleneimine)-polystyrene (PEI-PS) block copolymers utilizing controlled radical polymerization through the macroinitiator approach is presented. Poly(2-methyl-2-oxazoline) containing an alkoxyamine initiating unit at the chain end was prepared by ring opening cationic polymerization of 2-methyl-2-oxazoline through a nitroxide containing initiator. Polymerization of styrene with the poly(2-methyl-2-oxazoline) macroinitiator was carried out under nitroxide-mediated radical polymerization (NMRP) conditions. GPC and NMR revealed that the polymerization was accurately controlled and well-defined polystyrene chains were attached to the chain end of the macroinitiator to give the poly(2-methyl-2-oxazoline-b-styrene) block copolymers. Hydrolysis of the poly(2-methyl-2-oxazoline) block resulted effectively in poly(ethyleneimine-b-styrene) block copolymers.
Publisher Macromolecular Symposia
Citation Macromolecular Symposia 275-276 (2009) 59-66
Tags block copolymers controlled radical polymerization macroinitiator ring opening cationic polymerization ring-opening polymerization fragmentation chain transfer controlled monomer insertion graft-copolymers multiblock copolymers raft process polystyrene po

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