Patent ID: 8703832

Claim:
An interpenetrating polymer network, comprising: i) a first network of crosslinked cationic-conducting polymer referred to as A formed from monomers, at least one of which contains at least one aromatic group functionalized with at least one cation-exchange group, and results from the copolymerization of at least: a first monomer with at least one aromatic ring and two polymerizable functions PF1 and on at least one of the aromatic rings at least one cation-exchange group chosen from: an imidazolium, a carboxylic acid (COOY), a phosphonic acid (PO 3 Y) and a sulfonic acid (SO 3 Y), where Y is chosen from H, Li, Na, K and HNR 3 where R represents an alkyl group comprising 1 to 5 carbon atoms, a second monomer comprising at least two polymerizable functions PF2 susceptible to react with the functions PF1 of the first monomer to form a covalent bond, and ii) a second network of crosslinked fluorocarbon polymer referred to as B formed from monomers, at least one of which contains at least one fluorinated group (R F ), and results from the copolymerization of at least: a first monomer comprising groups CF n with n=1 to 3 comprising at least two polymerizable functions PF3, a second monomer comprising at least two polymerizable functions PF4 susceptible to react with the functions PF3 of the first monomer to form a covalent bond, wherein the distance between the networks of polymers A and B does not exceed 40 nm, and the networks of polymers A and B are not covalently bonded to each other.