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A supported iron catalyst, which was prepared by anchoring FeCl_ 2 /FeCl_ 3 on the cross-linking macroporous polyacrylate ion exchange resin, was evaluated via the controlled radical polymerization. When a small amount of CuCl_ 2 /Me_ 6 TREN was added, the controllability of the polymerization over the iron-mediated catalyst was significantly improved(M_ w /M_ n =1.23—1.73), affording a polymer with a low residual metal via a simple catalyst separation procedure. After suitable regeneration, the supported iron catalyst could also be recycled. UV-Vis analysis showed that the additional copper catalyst could facilitate the radical deactivation process.
A supported iron catalyst, which was prepared by anchoring FeCl 2 / FeCl 3 on the cross-linked macroporous polyacrylate ion exchange resin, was derived via the controlled radical polymerization. When a small amount of CuCl 2 / Me 6 TREN was added, the controllability of the polymerization over the iron-mediated catalyst was significantly improved (M w / M n = 1.23-1.73), affording a polymer with a low residual metal via a simple catalyst separation procedure. After appropriate regeneration, the supported iron catalyst could also be recycled. UV-Vis analysis showed that the additional copper catalyst could facilitate the radical deactivation process.