FLUORED POLYMERS AND MEMBRANES PREPARED FROM SUCH POLYMERS, IN PARTICULAR FOR FUEL BATTERIES AND SYNTHESIS PROCEDURE OF SUCH POLYMERS.

摘要

Fluorinated polymer comprising at least one repetitive motif of formula (I): (See formula) in which: - groups X and Y, identical or different, represent H or F; - the group Z represents F or a perfluorinated alkyl group; - group W represents CH2O; - the group Ar represents a divalent group comprising at least one carbon aromatic cycle optionally substituted; - group Q represents a single bond, (CF2) n with 1 _ n _ 10, or C2F4OC2F4; - group G represents a cation exchange group, preferably selected from: - SO2R1, representing R1 OH, F or Cl; or - P (= O) (OR 2) 2, representing R 2 H or an optionally substituted alkyl group; or - CO2H and having an ion exchange capacity greater than or equal to 0.5 meq / g of polymer.