Proton-conductive polymer film and process for producing the...

C - Chemistry – Metallurgy – 08 – L

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C08L 81/00 (2006.01) B01D 67/00 (2006.01) B01D 71/66 (2006.01) C08G 75/00 (2006.01) C08G 75/18 (2006.01) C08G 75/20 (2006.01) C08J 5/22 (2006.01) C08J 7/00 (2006.01) C08J 7/02 (2006.01) C08L 81/02 (2006.01) C08L 81/06 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2437135

A proton-conductive polymer film made of a polymer comprising repeating structural units represented by the following general formula (1) in which the aromatic units have been partly substituted with proton-conductive substituents, the film having a solubility in methanol at room temperature of less than 0.01 wt.% or having a solubility in N-methyl-2-pyrrolidone at 5 ~C of less than 5 wt.%. In the formula, Ar1 is a divalent aromatic unit and x is an integer of 0 to 2. Also provided is a process by which a proton-conductive polymer film having properties making the film usable in solid polymer electrolyte fuel cells is obtained in a simple manner which attains a substantial reduction in production cost.

L'invention concerne un film polymère conducteur protonique constitué d'un polymère comprenant des motifs structuraux récurrents, représentés par la formule générale (I) dans laquelle les motifs aromatiques ont été partiellement substitués par des substituants conducteurs protoniques. Ce film présente une solubilité dans le méthanol, à température ambiante, inférieure ou égale à 0,01 % en poids ou une solubilité dans la N-méthyl-2-pyrrolidone, à 5 ·C, inférieure ou égale à 5 % en poids. Dans la formule, Ar¿1? représente un motif aromatique divalent et x est un entier compris entre 0 et 2. L'invention concerne également un procédé selon lequel un film polymère conducteur protonique, qui présente des propriétés permettant de l'utiliser dans des cellules électrochimiques à électrolyte polymère solide, est obtenu de manière simple et sensiblement plus économique.

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