Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5211051 | Reactive and Functional Polymers | 2009 | 7 Pages |
Abstract
We report the synthesis of a well-defined linear tetrablock quaterpolymer of poly(butyl acrylate)-b-polystyrene-b-poly(methyl acrylate)-b-poly(methyl methacrylate) by combining atom transfer radical polymerization (ATRP) and a click coupling approach. For this purpose, polystyrene-b-poly(butyl acrylate) (AB) was prepared by ATRP using macroinitiator as α-trimethylsilyl(TMS)-alkyne Ï-bromo polystyrene. The α-(TMS) end of the AB diblock copolymer was deprotected using tetrabutylammonium fluoride (TBAF) in THF. The Ï-azide end of the CD diblock copolymer was made from poly(methyl methacrylate)-b-poly(methyl acrylate) (CD) via transformation of the bromine chain end by a simple nucleophilic substitution reaction with NaN3 in DMF. Click coupling between the Ï-azide end in CD diblock copolymer with the α-alkyne end in the AB diblock copolymer was then performed by Cu1-catalyzed (3+2) cycloaddition. Gel permeation chromatography (GPC), FT-IR and 1H NMR spectroscopy confirmed the successful formation of a linear ABCD tetrablock copolymer via ATRP and click coupling.
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Authors
Aleya Hasneen, Ho Seok Han, Hyun-Jong Paik,