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Polymer Electrolyte Membranes Prepared by Graft Copolymerization of 2-Acrylamido-2-Methylpropane Sulfonic Acid and Acrylic Acid on PVDF and ETFE Activated by Electron Beam Treatment

1
Institute of Technical Chemistry, Clausthal University of Technology, Arnold-Sommerfeld-Strasse 4, 38678 Clausthal-Zellerfeld, Germany
2
Institut fur Leichtbau und Kunststofftechnik, Technische Universitat Dresden, Hohlbeinstrabe 3, 01307 Dresden, Germany
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1175; https://doi.org/10.3390/polym11071175
Received: 24 May 2019 / Revised: 27 June 2019 / Accepted: 5 July 2019 / Published: 11 July 2019
(This article belongs to the Special Issue Polymer Electrolytes for Energy Storage and Conversion Devices)
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Abstract

Polymer electrolyte membranes (PEM) for potential applications in fuel cells or vanadium redox flow batteries were synthesized and characterized. ETFE (poly (ethylene-alt-tetrafluoroethylene)) and PVDF (poly (vinylidene fluoride)) serving as base materials were activated by electron beam treatment with doses ranging from 50 to 200 kGy and subsequently grafted via radical copolymerization with the functional monomers 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid in aqueous phase. Since protogenic groups are already contained in the monomers, a subsequent sulfonation step is omitted. The mechanical properties were studied via tensile strength measurements. The electrochemical performance of the PEMs was evaluated by electrochemical impedance spectroscopy and fuel cell tests. The proton conductivities and ion exchange capacities are competitive with Nafion 117, the standard material used today. View Full-Text
Keywords: polymer electrolyte membranes; ETFE; PVDF; acrylic acid; 2-acrylamido-2-methylpropane sulfonic acid; fuel cells polymer electrolyte membranes; ETFE; PVDF; acrylic acid; 2-acrylamido-2-methylpropane sulfonic acid; fuel cells
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ke, X.; Zhang, Y.; Gohs, U.; Drache, M.; Beuermann, S. Polymer Electrolyte Membranes Prepared by Graft Copolymerization of 2-Acrylamido-2-Methylpropane Sulfonic Acid and Acrylic Acid on PVDF and ETFE Activated by Electron Beam Treatment. Polymers 2019, 11, 1175.

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