MIXED-SULFONATION BLOCK COPOLYMERS

摘要

Sulfonated block copolymers that may be used as membranes for fuel cells include sulfonated polyaryletherketone blocks and lightly sulfonated polyethersulfone blocks. The sulfonated polyaryletherketone blocks include structural units of formula (I) and the lightly sulfonated polyethersulfone blocks include structural units of formula (II) and (III) wherein R¹, R², R³, R⁴, R⁵ and R⁶ are independently C₁-C₁₀ alkyl, C₃-C₁₂ cycloalkyl, C₆-C₁₄ aryl, allyl, alkenyl, alkoxy, halo, or cyano; Z, Z¹ and Z² 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 and e are independently 0 or an integer from 1 to 3 ; b, c, d, and f are independently 0 or an integer from 1 to 4; m, n and p are independently 0 or 1 ; and r is an integer from 1 to 5.