Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 44, Issue 19, Pages 5699-5707Publisher
WILEY
DOI: 10.1002/pola.21633
Keywords
alkyne; atom transfer radical polymerization; azide; click chemistry; hetero-arm star polymers; nitroxide-mediated radical polymerization
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Hetero-arm star ABC-type terpolymers, poly(methyl methacrylate)-polystyrene-poly(tert-butyl acrylate) (PMMA-PS-PtBA) and PMMA-PS-poly(ethylene glycol) (PEG), were prepared by using Click chemistry strategy. For this, first, PMMA-b-PS with alkyne functional group at the junction point was obtained from successive atom transfer radical polymerization (ATRP) and nitroxide-mediated radical polymerization (NMP) routes. Furthermore, PtBA obtained from ATRP of tBA and commercially available monohydroxyl PEG were efficiently converted to the azide end-functionalized polymers. As a second step, the alkyne and azide functional polymers were reacted to give the hetero-arm star polymers in the presence of CuBr/N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA) in DMF at room temperature for 24 h. The hetero-arm star polymers were characterized by H-1 NMR, GPC, and DSC. (c) 2006 Wiley Periodicals, Inc.
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