Journal
POLYMER INTERNATIONAL
Volume 52, Issue 10, Pages 1559-1565Publisher
WILEY
DOI: 10.1002/pi.1339
Keywords
atom transfer radical polymerization; ATRP; star copolymers; controlled radical polymerization; living radical polymerization
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Several different methods for the synthesis of star copolymers employing atom transfer radical polymerization are presented. They include core-first and arm-first methods, and a combination of both to prepare mikto-arm stars. Stars with a well-defined number of arms were prepared by using a core with a precise number of functional groups, and ill-defined stars were prepared from hyperbranched cores. In addition, end-functional stars were prepared by either displacing end-functional halogens or through radical addition with unreactive functional alkenes. Another approach to end-functional stars employs functional initiators and the subsequent coupling of the end-functional arms with difunctional vinyl monomers. Star-like backbones were also used to grow star-like macromolecular brushes that were visualized by AFM. The polydispersities of individual arms and entire stars followed Schulz-Flory statistics. (C) 2003 Society of Chemical Industry.
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