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Photoinduced sequence-control via one pot living radical polymerization of acrylates
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Anastasaki, Athina, Nikolaou, Vasiliki, Pappas, George S., Zhang, Qiang, Wan, Chaoying, Wilson, Paul, Davis, Thomas P., Whittaker, Michael R. and Haddleton, David M. (2014) Photoinduced sequence-control via one pot living radical polymerization of acrylates. Chemical Science, 5 (9). p. 3536. doi:10.1039/c4sc01374c ISSN 2041-6520.
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Official URL: http://dx.doi.org/10.1039/C4SC01374C
Abstract
The ability to regulate the activation and deactivation steps via an external stimulus has always been a challenge in polymer chemistry. In an ideal photo-mediated system, whereby high monomer conversion and excellent end group fidelity can be maintained, precise control over the polymer composition and microstructure would be a significant breakthrough. Herein, we report, a versatile, simple and inexpensive method that allows for the synthesis of sequence-controlled multiblock copolymers in a one pot polymerization reaction at ambient temperature. In the absence of a conventional photoredox catalyst and dye-sensitisers, low concentrations of CuBr2 in synergy with Me6-Tren mediate acrylic block copolymerization under UV irradiation (λmax ≈ 360 nm). Four different acrylate monomers were alternated in various combinations within the polymer composition illustrating the potential of the technique. Narrow disperse undecablock copolymers were obtained (Đ < 1.2) with quantitative conversion achieved between the iterative monomer additions. The effect of the chain length was investigated allowing for higher molecular weight multiblock copolymers to be obtained. This approach offers a versatile and inexpensive platform for the preparation of high-order multiblock functional materials with additional applications arising from the precise spatiotemporal “on/off” control and resolution when desired.
| Item Type: | Journal Article | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||||
| Journal or Publication Title: | Chemical Science | ||||||||||
| Publisher: | Royal Society of Chemistry | ||||||||||
| ISSN: | 2041-6520 | ||||||||||
| Official Date: | 1 September 2014 | ||||||||||
| Dates: |
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| Volume: | 5 | ||||||||||
| Number: | 9 | ||||||||||
| Page Range: | p. 3536 | ||||||||||
| DOI: | 10.1039/c4sc01374c | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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