Development of novel proton-conductive polymers for proton...

C - Chemistry – Metallurgy – 08 – G

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C08G 61/12 (2006.01) C08G 61/02 (2006.01) C08J 5/22 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2662066

New thermally and chemically stable sulfonic acid-containing polymers are synthesized via post-sulfonation of aromatic polymers. These new polymers provide unique benefits to proton exchange membrane fuel cell technology ("PEMFC"). As a sulfonic acid moiety can be easily installed into an aromatic ring via electrophilic sulfonation, even in the presence of an electron-withdrawing substituent such as -F, rigid polymers consisting of aromatic rings at either the side chain or main chain can be prepared with a wide range of substituents and flexibility in properties. Novel synthetic procedures are provided for synthesis of the polymers.

Nouveaux polymères sulfoniques contenant de l'acide sulfonique à stabilité thermique et chimique, synthétisés via post-sulfonation de polymères aromatiques. Ces nouveaux produits offrent des avantages uniques à la technologie de pile à combustible à membrane échangeuse de protons. Sachant qu'il est facile d'installer une fraction d'acide sulfonique dans une chaîne aromatique via sulfonation électrophile, même en présence de substituant soustracteur d'électron du type -F, il est possible d'élaborer des polymères rigides à chaînes aromatiques soit en chaîne latérale soit en chaîne principale au moyen d'une large gamme de substituants et avec de la flexibilité en termes de propriétés. Également, nouveaux procédés synthétiques pour la synthèse des polymères.

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