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Sequence-controlled multi-block copolymerization of acrylamides via aqueous SET-LRP at 0 °C
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Alsubaie, Fehaid, Anastasaki, Athina, Wilson, Paul and Haddleton, David M. (2015) Sequence-controlled multi-block copolymerization of acrylamides via aqueous SET-LRP at 0 °C. Polymer Chemistry, 6 (3). pp. 406-417. doi:10.1039/c4py01066c
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Official URL: http://dx.doi.org/10.1039/C4PY01066C
Abstract
Aqueous single electron transfer living radical polymerization (SET-LRP) has been employed to synthesize multi-block homopolymers and copolymers of a range of acrylamide monomers including N-isopropylacrylamide (NIPAM), 2-hydroxyethyl acrylamide (HEAA), N,N-dimethyl acrylamide (DMA) and N,N-diethylacrylamide (DEA). Disproportionation of Cu(I)Br in the presence of Me6TREN in water was exploited to generate reactive Cu(0) and [CuII(Me6TREN)]Br2in situ resulting in unprecedented rates of reaction whilst maintaining control over chain lengths and molecular weight distributions (Đ < 1.10). Kinetic studies enabled optimization of iterative chain extensions or block copolymerizations furnishing complex compositions in a matter of minutes/hours. In the multi-block copolymer system, the monomer sequence was successfully varied and limiting effects on the polymerization have been comprehensively examined through a series of control experiments which imply that the rate of ω-Br chain end loss is enhanced in tertiary acrylamides (DMA, DEA, N-acryloylmorpholine NAM) relative to secondary acrylamides (NIPAM, HEAA).
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science > Chemistry | ||||||||
| Journal or Publication Title: | Polymer Chemistry | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 1759-9954 | ||||||||
| Official Date: | 2015 | ||||||||
| Dates: |
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| Volume: | 6 | ||||||||
| Number: | 3 | ||||||||
| Page Range: | pp. 406-417 | ||||||||
| DOI: | 10.1039/c4py01066c | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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