Chinese Journal of Applied Chemistry

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Metal-mediated Activators Generated by Electron Transfer for Atom Transfer Radical Polymerization of Methyl Methacrylate with Basic Ionic Liquids as the Catalyst

CHEN Min, DENG Zhijun*, ZHANG Liben, LI Xiaogang   

  1. (Jiangsu Dewei Advanced Materials Co.,Led,Taicang 215421,China)
  • Received:2013-07-22 Revised:2013-09-10 Published:2014-05-10 Online:2014-05-10

Abstract: Basic ionic liquids(BILs), including 1-butyl-3-methyl imidazolium hydroxide([Bmim][OH]), coordinated with iron chloride, copper chloride, and ruthenium trichloride, were used as both the ligand and catalyst in activators generated by electron transfer for atom transfer radical polymerization(AGET ATRP) of methyl methacrylate(MMA) in bulk and solution, using ethyl 2-bromoisobutyrate(EBiB) as the initiator, vitamin C(VC) as the reducing agent. Catalytic amount of BILs can enhance the polymerization rate, and produce PMMA with controllable relative molecular mass and narrow relative molecular mass distribution(Mw/Mn=1.20~1.50). The influence of the addition of BILs on the polymerization rate and relative molecular mass distributions were investigated. The catalytic properties of the three catalytic systems were studied by cyclic voltammetry(CV) characterization. The nature of controlled/“living” free radical polymerization in the presence of BILs was confirmed by chain-extension experiments. The ready solubility of BILs enables them to be applied as a new type of catalyst in AGET ATRP.

Key words: activators generated by electron transfer, atom transfer radical polymerization, basic ionic liquid-metal salts, cyclic voltammetry, catalyst,polymethylmethacrylate, chain extension

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