Sulfonated polyaryletherketone-polyethersulfone block 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 the polyethersulfone blocks comprising structural units of formula wherein R¹, R², R³ and R⁴ are independently C₁-C₁₀ alkyl, C₃-C₁₂ cycloalkyl, C₆-C₁₄ aryl, allyl, alkenyl, alkoxy, halo, or cyano; Z and Z¹ are independently a direct bond or O, S, (CH₂)_r, (CF₂)_r, C(CH₃)₂, C(CF₃)₂, or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof a is 0 or an integer from 1 to 3; b, c and d are independently 0 or an integer from 1 to 4; m and n are independently 0 or 1; and r is an integer from 1 to 5.