New copper(i) complex based initiating systems in redox polymerization and comparison with the amine/benzoyl peroxide reference. Issue 28 (24th May 2017)

• Record Type: Journal Article
• Authors: Garra, P.; Kermagoret, A.; Al Mousawi, A.; Dumur, F.; Gigmes, D.; Morlet-Savary, F.; Dietlin, C.; Fouassier, J. P.; Lalevée, J.
• Is Part Of: Polymer chemistry. Volume 8:Issue 28(2017)
• Page Start: 4088
• Page End: 4097
• Publication Date: 2017-05-24
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c7py00726d
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Novel copper complex based initiating systems for redox free radical polymerization (FRP) of methacrylate resins under mild conditions are proposed. 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.