Patent ID: 8101669

Claim:
An exchange membrane containing modified maleimide oligomers, comprising sulfonated poly(arylether ketones) (S-PAEKS) and modified maleimide oligomers as matrix, wherein the modified maleimide oligomers are formed by performing a thermal cross-linking reaction between barbituric acid and bismaleimide, and wherein the barbituric acid is the structure represented by formula (I) below: wherein R 1 and R 2 are independently selected from the group consisting of —H, —CH 3 , —C 2 H 5 , —C 6 H 5 , —CH(CH 3 ) 2 , —CH 2 CH 2 CH(CH 3 ) 2 and —CH(CH 3 )—CH 2 —CH 2 —CH 3 , and the bismaleimide is one of the structure represented by formula (II) below: wherein R is independently selected from the group consisting of —(CH2) n -, in which 1≦n≦20, —[C(CH 2 ) 2 ] m —, in which 1≦m≦20, —[CH 2 —C(CH 3 ) 2 ] p , in which 1≦p≦10, in which 1≦q≦10, and the structure represented by formula (III) below: wherein Y is selected from the group consisting of R, SO 2 , S, O, CONH and C(CF 3 ) 2 ; and X 1 to X 8 are independently selected from R, H, F, Cl, Br, HSO 3 and SO 2 .