Abstract: A supported iron catalyst, which was prepared by anchoring FeCl₂/FeCl₃ on the cross-linking macroporous polyacrylate ion exchange resin, was evaluated via the controlled radical polymerization.When a small amount of CuCl₂/Me₆TREN 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.

Key words: Controlled radical polymerization, Supported catalyst, Iron halide, Copper halide