A hybrid supported nickel catalyst for the controlled radical polymerization of methyl methacrylate

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• 作者：Zhonghui Li ; Hong Li ; Yongming Zhang ; Minzhao Xue ; Lei Zhou and Yangang Liu
• 刊名：Applied Catalysis A: General
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：292
• 期：Complete
• 页码：61-67
• 全文大小：200 K

文摘

A hybrid nickel-copper catalyst, which consists of a small ratio of copper catalyst and the supported nickel catalyst prepared by anchoring the nickel chloride on the cross-linking polyacrylate ion-exchange resin, has an effective catalytic activity for the polymerization of methyl methacrylate. The catalyst affords polymers with predetermined molecular weight and relatively narrow molecular weight distribution (M_w/M_n = 1.26–1.67). The supported catalyst can be removed from the reaction medium by simple centrifugation with a low level of residual metal in the resulting polymer (5–7 ppm Ni, 12–29 ppm Cu). The supported nickel catalyst can be recycled conveniently with a relatively high catalytic activity without any regeneration treatment.