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Chem. J. Chinese Universities

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Cation Exchange Reaction of Poly(lithium acrylate) with 1-Butyl-3-methylimidazolium Bromide

ZHANG Xiao-Meng1, LI Jun1*, LIU Zheng-Ping2*, ZHANG Li-Xin1   

    1. Institute of Polymer Chemistry and Physics, College of Chemistry,
    2. BNU Key Lab of Environmentally Friendly and Functional Polymer Materials, Beijing Normal University, Beijing 100875, China
  • Received:2008-05-14 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
  • Contact: LI Jun, LIU Zheng-Ping

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Abstract: A new kind of conducting random copolymer of lithium acrylate with 1-butyl-3-methylimidazolium acrylate[P(AALi-BmimAA)] was prepared by the cation exchange reaction of PAALi with 1-butyl-3-methylimidazolium bromine ionic liquid. As a result, well-ordered structure of poly(lithium acrylate)(PAALi) was destroyed by introducing the 1-butyl-3-methylimidazolium cation and the formed copolymers had lower Tg and more than PAALi. Thus, the ionic conductivity of copolymer became higher than PAALi. The highest ionic conductivity of copolymer is 1.44×10-8 S/cm which is higher than that of PAALi in three orders of magnitude. After mixing with LiTFSI, the ionic conductivity of copolymer increased two orders of magnitude to 2.90×10-6 S/cm again.

Key words: PAALi, 1-Butyl-3-methylimidazolium bromine, Random copolymer, Cation exchange reaction, Ion conductivity

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