Iron-Mediated ICAR ATRP of Methyl Methacrylate

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• 作者：Gaohua Zhu ; Lifen Zhang ; Zhengbiao Zhang ; Jian Zhu ; Yingfeng Tu ; Zhenping Cheng ; Xiulin Zhu
• 刊名：Macromolecules
• 出版年：2011
• 出版时间：May 10, 2011
• 年：2011
• 卷：44
• 期：9
• 页码：3233-3239
• 全文大小：891K
• 年卷期：v.44,no.9(May 10, 2011)
• ISSN：1520-5835

文摘

An iron(III) (FeCl₃路6H₂O) catalyst was found to be an active catalyst for initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP) of methyl methacrylate (MMA), using triphenylphosphine (PPh₃) as a ligand and azobis(isobutyronitrile) (AIBN) as a thermal radical initiator, and 1,4-(2-bromo-2-methylpropionato)benzene (BMPB₂) as an ATRP initiator. Effects of reaction temperature, catalyst concentration and AIBN concentration on polymerization were investigated. These results showed that the catalyst was highly efficient for the ICAR ATRP of MMA. For example, even if the catalyst concentration decreased to 34 ppm, the polymerization with the molar ratio of [MMA]₀/[BMPB₂]₀/[FeCl₃路6H₂O]₀/[PPh₃]₀/[AIBN]₀ = 500/1/0.03/1.5/0.1 could be carried out at 60 掳C with a conversion 70.4% in 32 h. At the same time, the molecular weight of the obtained PMMA with a narrow molecular weight distribution (M_w/M_n = 1.37) was consistent with the theoretical one.