Access to three-arm star block copolymers by a consecutive combination of the copper(I)-catalyzed azide-alkyne cycloaddition and the RAFT hetero Diels-Alder concept

Sinnwell, S., Inglis, A. J., Stenzel, M. H., & Barner-Kowollik, C. (2008) Access to three-arm star block copolymers by a consecutive combination of the copper(I)-catalyzed azide-alkyne cycloaddition and the RAFT hetero Diels-Alder concept. Macromolecular Rapid Communications, 29(12-13).

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Abstract

Three-arm star block copolymers have been synthesized from linear polystyrene (PS) and poly(ε-caprolactone) (PCL) building blocks. Through the use of an α-diene-ω-alkyne functionalized PCL, the PS-b-PCL stars have been synthesized via either forming the PS-b-PCL arms first with the hetero Diels-Alder (HDA) cycloaddition and their subsequent coupling to a triazide coupling agent through a copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) (arm-first) or via forming the basic star structure first through the CuAAC of the coupling agent and the PCL, with the diblock stars achieved by the subsequent HDA cycloaddition with the PS (core-first). The use of the two consecutive reactions has facilitated high conversions and a good control over the multiple reaction sites. In both examples, the CuAAC proceeded to quantitative conversion whereas the HDA cycloaddition proceeded to 94% conversion in the arm-first approach and 81% in the core-first approach. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

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ID Code: 99195
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :51
Export Date: 5 September 2016
CODEN: MRCOE
Correspondence Address: Stenzel, M. H.; Centre for Advanced Macromolecular Design (CAMD), School of Chemical Sciences and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; email: m.stenzel@unsw.edu.au
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Keywords: Block copolymers, Click chemistry, Hetero Diels-Alder cycloaddition, Reversible addition fragmentation chain transfer (RAFT), Star polymers, ABS resins, Acetylene, Copolymerization, Copolymers, Copper, Coupling agents, Directive antennas, Free radical polymerization, Plastic products, Polymers, Polystyrenes, Stars, Building Blocks, Caprolactone, Consecutive reactions, Coppers (i), Diblock, Functionalized, Linear polystyrenes, Reaction sites, Star structures, Triazide, Cycloaddition
DOI: 10.1002/marc.200800233
ISSN: 10221336
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 10 Oct 2016 04:55

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