Multiblock copolymers containing hydrophilic-hydrophobic...

Details Multiblock copolymers containing hydrophilic-hydrophobic... Multiblock copolymers containing hydrophilic-hydrophobic...

C - Chemistry, Metallurgy

08

L

C08L 81/06 (2006.01) H01M 6/18 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2545375

Novel multiblock copolymers containing perfluorinated poly(arylene ether) as a hydrophobic segment and disulfonated poly(arylene ether sulfone) as a hydrophilic segment are provided. The multiblock copolymers are used to form proton exchange membranes that are thermally and hydrolytically stable, flexible, and that exhibit low methanol permeability and high proton conductivity. The proton exchange membranes are thus well-suited for use for use as polymer electrolytes in fuel cells.

L'invention concerne de nouveaux copolymères multiblocs contenant un poly(arylène éther) perfluoré comme segment hydrophobe et un poly(arylène éther sulfone) disulfoné comme segment hydrophile. Les copolymères multiblocs sont utilisés pour former des membranes à échange de protons stables et flexibles d'un point de vue thermique et hydrolytique, et présentant une faible perméabilité au méthanol et une conductivité protonique élevée. Les membranes à échange de protons sont ainsi particulièrement adaptées pour être utilisées comme électrolytes polymériques dans les piles à combustible.

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