Polymer electrolyte membranes crosslinked by direct...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/18 (2006.01) C08F 14/18 (2006.01) C08J 3/24 (2006.01) C08J 5/22 (2006.01)

Patent

CA 2550285

A method is provided for making a crosslinked polymer by direct fluorination of a non-perfluorinated polymer comprising first pendent groups which comprise sulfonyl halide groups or by direct fluorination of a polymer mixture of a first polymer which is a non-perfluorinated polymer and a second polymer which comprises first pendent groups which comprise sulfonyl halide groups. Such crosslinked polymers or polymer mixtures may be used to make polymer electrolyte membranes (PEM's) that may be used in electrolytic cells such as fuel cells and which should demonstrate increased durability in fuel cell use.

L'invention concerne un procédé destiné à fabriquer un polymère réticulé par la fluoration directe d'un polymère non perfluoré comprenant des premiers groupes latéraux qui comprennent des groupes d'halogénures de sulfonyle ou par la fluoration directe d'un mélange de polymères d'un premier polymère qui est un polymère non perfluoré et d'un deuxième polymère, qui comprend des premiers groupes latéraux qui contiennent des groupes d'halogénures de sulfonyle. Ces polymères ou ces mélanges de polymères réticulés peuvent s'utiliser pour fabriquer des membranes d'électrolytes polymères (des PEM) qui peuvent s'utiliser dans des cellules électrolytiques telles que les piles à combustible, et qui peuvent manifester une plus grande durabilité lors de l'usage des piles à combustible.

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