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
|
Wikidata
|
|
Citation
|
Macromolecular Symposia 275-276 (2009) 59-66
|
DOI
|
https://doi.org/10.1002/masy.200950107
|
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
|