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Atom transfer radical polymerization and copolymerization of isoprene catalyzed by copper bromide/2,2'-bipyridine

Yi-Feng Zhu ,  Feng-Jiao Jiang ,  Pan-Pan Zhang ,  Jiao Luo ,  Hua-Dong Tang

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引用本文: Yi-Feng Zhu,  Feng-Jiao Jiang,  Pan-Pan Zhang,  Jiao Luo,  Hua-Dong Tang. Atom transfer radical polymerization and copolymerization of isoprene catalyzed by copper bromide/2,2'-bipyridine[J]. Chinese Chemical Letters, 2016, 27(6): 910-914. doi: 10.1016/j.cclet.2016.02.029 shu
Citation:  Yi-Feng Zhu,  Feng-Jiao Jiang,  Pan-Pan Zhang,  Jiao Luo,  Hua-Dong Tang. Atom transfer radical polymerization and copolymerization of isoprene catalyzed by copper bromide/2,2'-bipyridine[J]. Chinese Chemical Letters, 2016, 27(6): 910-914. doi: 10.1016/j.cclet.2016.02.029 shu

Atom transfer radical polymerization and copolymerization of isoprene catalyzed by copper bromide/2,2'-bipyridine

  • Institute of Industrial Catalysis, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China

  • 基金项目:

    This work was supported by the National Natural Science Foundation of China (No. 21174133) and Zhejiang Science Foundation for Distinguished Young Scholars (No. LR12B04002).

摘要: ATRP, as one of the most successful controlled/"living" radical polymerization techniques, has been applied to a large variety of monomers including styrenes, (meth)acrylates, (meth)acrylamides, acrylonitrile, and vinyl acetate. However, ATRP of isoprene still remains a challenge due to poor solubility of copper catalysts in isoprene and low chain propagation rate constant of the monomer. In this work, CuBr/2,2'-bipyridine was found to effectively mediate ATRP of isoprene at 100 ℃, 130 ℃, and 150 ℃ with ethyl 2-bromopropionate as an initiator. The polymerizations proceeded smoothly and reached 48.1%, 53.3%, and 71.0% conversions, respectively, in 72 h, producing polyisoprenes with molecular weights close to theoretical values and relatively narrow distributions. A block copolymer of polystyrene-bpolyisoprene was prepared using CuBr/2,2''-bipyridine as a catalyst and polystyrene as amacroinitiator. The 1H NMR and 13C NMR analysis of polyisoprene indicated that the polymer had 88.8% 1,4-addition structure and 63.9% of the polymer backbone units were in trans-configuration.

English

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  • 收稿日期:  2015-11-19
  • 修回日期:  2016-02-04
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