Tetrasulfonated poly(arylene biphenyl sulfone) copolymers, Manufacturing Method thereof and Proton Exchange Membrane for Fuel Cells comprising thereof

摘要

The present invention relates to a tetra sulfonated polyarylene biphenyl sulfone copolymer having the following general formula (1), a process for producing the same, and a cation exchange membrane for a fuel cell comprising the compound represented by the general formula (1). (1) In the above formula (1), Ar ₁ , Ar ₂ and Ar ₃ are each independently any one selected from the following formulas (2-1) to (2-6) Y is -S-, -O-, -N-, -C ( = O) - or -S (= O) ₂ -, and X is or Lt; M is -H, -Li, -Na, -K, -Rb, -Cs or Fr, n is from 0.01 to 1, z is from 10 to 800. (2-1) (2-2) (2-3) (2-4) (2-5) (2-6)