POLYMERES DE TYPE POLYPHENYLENES, LEUR PROCEDE DE PREPARATION, MEMBRANES ET DISPOSITIF DE PILE A COMBUSTIBLE COMPRENANT CES MEMBRANES

摘要

Polymers with phenylene units, at least one of which has a lateral phenylene group substituted with a group or perfluorinated chain carrying a sulfonic acid, phosphonic acid or carboxylic acid group. Polymers with phenylene units of formula (I) and (II), where at least one of which has a lateral phenylene group substituted with a group or perfluorinated chain carrying a sulfonic acid, phosphonic acid or carboxylic acid group. R1, R2, R3 = H, halogen, alkyl, aryl, perfluoroalkyl or perfluoroaryl; E = a single bond, -CO-, -P(O)- or -SO2-; W1 = arylene or perfluoroarylene; A = -O-, -S-, -NH- or -NR9-; R9 = alkyl; W2 = aryl (substituted with F, -OSO2-aryl or -SO-aryl), or perfluoroaryl; R4-R8 = (a) H, halogen, OH, or -M(R10)3, (b) -P(O)(OR11)2, (c) aryl, aryloxy, -SO2-aryl, or alkyl-aryl, perfluoroalkyl or perfluoroalkylaryl (the last three optionally with in-chain O, N and/or S atom(s)), (d) perfluoroaryl or perfluoroaryloxy (optionally substituted with -SO3H, -PO3H2 or -COOH), or (e) an -SO3H, -PO3H2 or -COOH group, with the proviso that at least one of these groups is selected from -SO3H, -PO3H2, -COOH, perfluoroalkyl, perfluoroalkylaryl (optionally with in-chain O, N and/or S), perfluoroaryl and perfluoroaryloxy (optionally substituted as above), and that the acid groups may be in the form of their alkali metal salts; R9, R10 = alkyl; and M = Si, Ge or Sn. Independent claims are also included for the following: (1) Method for the production of these polymers by reacting a base polymer comprising repeat units (II) with compound(s) of formula Ar-A2 (III); (2) Membranes containing sulfonated polymers as above; and (3) Fuel cells containing these membranes. Ar = a phenyl group substituted with groups R4-R8 as above; and A2 = OH, SH, NH2 or -NHR9, said group being capable of the nucleophilic substitution of a group attached to W2, i.e. F, -OSO2-aryl or -S(O)-aryl.