Synthesis of fluorinated block copolymer electrolyte containing quaternary ammonium base
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Abstract
Fluorinated block copolymers poly(2,3,4,5,6-pentafluorostyrene)-b-poly(styrene) (PFS-b-PS) synthesized by atom transfer radical polymerization was functionalized with quaternary ammonium base groups via chloromethylation of PFS-b-PS, followed by reactions with trimethylamine and ion exchange with KOH to prepare anion exchange block polymer electrolytes (AEBPEs). The challenges and limitations during the synthesis are discussed. A comparative study on the chloromethylation of PFS-b-PS with two kinds of chloromethylation agents is carried out. The thermal stability, morphology, and conductivity of the obtained AEBPEs (PFS-b-QAPS(OH)) were investigated by thermogravimetry analysis, differential scanning calorimeter, small-angle X-ray scattering, and AC impedance, respectively.
Keywords
Block Copolymer Polymer Electrolyte Atom Transfer Radical Polymerization Atom Transfer Radical Polymerization Vinyl BenzylNotes
Acknowledgements
We gratefully acknowledge the financial support provided by the Shanghai Natural Science Foundation (15ZR1422100) and State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic University), Tianjin 300387, P. R. China.
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