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New copper(I) complex based initiating systems in redox polymerization and comparison with the amine/benzoyl peroxide reference

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Abstract

Novel copper complex based initiating systems for redox free radical polymerization (FRP) of methacrylate resins under mild conditions are proposed. Remarkably, the FRP performance of the Cu(I)/ascorbic acid (Vitamin C – VitC)/benzoyl peroxide (BPO) redox system is noticeably more significant than that of the amine/BPO reference especially at the top surface where the oxygen inhibition is particularly deleterious. The Cu(I)/BPO interaction leads to a decomposition of the peroxide and generates a benzoyl radical and Cu(II) as a byproduct. The ascorbic acid acts as a reducing agent and allows the regeneration of Cu(I) from Cu(II). Hydroperoxides formed at the surface through the radical/O2 interaction are also decomposed by the new proposed Cu complex leading to additional polymerization initiating species. The structure/reactivity relationship of the new proposed Cu(I) complexes in the Cu(I)/VitC/BPO systems is studied. The use of Cu(I)/VitC/BPO/iodonium salt systems in redox photoactivated FRP is also explored.

Graphical abstract: New copper(i) complex based initiating systems in redox polymerization and comparison with the amine/benzoyl peroxide reference

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Publication details

The article was received on 28 Apr 2017, accepted on 16 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7PY00726D
Citation: Polym. Chem., 2017, Advance Article
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    New copper(I) complex based initiating systems in redox polymerization and comparison with the amine/benzoyl peroxide reference

    P. Garra, A. Kermagoret, A. Al Mousawi, F. Dumur, D. Gigmes, F. Morlet-Savary, C. Dietlin, J. P. Fouassier and J. Lalevée, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C7PY00726D

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