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Synthesis of well-defined α,ω-telechelic multiblock copolymers in aqueous medium : in situ generation of α,ω-diols
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Simula, Alexandre, Nikolaou, Vasiliki, Anastasaki, Athina, Alsubaie, Fehaid, Nurumbetov, Gabit, Wilson, Paul, Kempe, Kristian and Haddleton, David M. (2015) Synthesis of well-defined α,ω-telechelic multiblock copolymers in aqueous medium : in situ generation of α,ω-diols. Polymer Chemistry, 6 (12). pp. 2226-2233. doi:10.1039/c4py01802h ISSN 1759-9954.
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Official URL: http://dx.doi.org/10.1039/C4PY01802H
Abstract
The synthesis of well-defined α,ω-dihydroxyl telechelic multiblock copolymers by sequential in situ chain extensions via aqueous Cu(0) mediated living radical polymerization (SET-LRP) is reported. The rapid disproportionation of Cu(I)Br in the presence of Me6-TREN in water has been exploited to generate Cu(0) and [Cu(II)Br2/Me6-TREN] in situ, resulting in rapid reaction rate and narrow molecular weight distributions. Under optimized conditions, a telechelic heptablock copolymer was obtained within 2 hours with a final dispersity of ∼1.1 while the monomer conversion was >99% for each block. A range of acrylamides and acrylates have been successfully incorporated within the same polymer backbone, including N-isopropylacrylamide (NIPAAm), N,N-diethylacrylamide (DEA) and N,N-dimethylacrylamide (DMA) and poly(ethylene glycol) methyl ether acrylate (PEGA480). The thermo-responsive nature of these materials was subsequently demonstrated via cloud point measurements as both a function of molecular weight and backbone functionality. In addition, the typically unwanted hydrolysis of the α- and ω-end groups in aqueous media was further exploited via isocyanate post-polymerization modifications to alter the end group functionality.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
| Journal or Publication Title: | Polymer Chemistry | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 1759-9954 | ||||||||
| Official Date: | 28 March 2015 | ||||||||
| Dates: |
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| Volume: | 6 | ||||||||
| Number: | 12 | ||||||||
| Page Range: | pp. 2226-2233 | ||||||||
| DOI: | 10.1039/c4py01802h | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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