SULFONATED POLYARYLETHERKETONE-BLOCK-POLYETHERSULFONE COPOLYMERS

摘要

Sulfonated block copolymer suitable for use as proton exchange membranes for fuel cells comprise sulfonated polyaryletherketone blocks and polyethersulfone blocks. The sulfonated polyaryletherketone blocks comprise structural units of formula (I) wherein R¹ is C₁-C₁₀ alkyl, C₃-C₁₂ cycloalkyl, C₆-C₁₄ aryl, allyl, alkenyl, alkoxy, halo, or cyano; Ar¹ and Ar² are each independently C₆-C_2O aromatic radicals, or Ar¹ and Ar², taken together with an intervening carbon atom, form a bicyclic C₆-C₂₀ aromatic radical or a tricyclic C₆-C₂₀ aromatic radical; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof; and a is 0 or an integer from 1 to 4.