Patent ID: 7632591

Claim:
A branched multiblock polybenzimidazole-benzamide copolymer consisting of a repeating unit represented by the following Formula 1: wherein, AZ represents at least one repeating unit selected from the group consisting of Formulas 2 and 3; AM represents at least one repeating unit selected from the group consisting of Formulas 4, 5, 6 and 7: wherein, Ar, Ar 2 , Ar 2′ and Ar 9 are independently identical or different to each other, each representing a tetravalent aromatic or heteroaromatic group having at least one ring; Ar 1 , Ar 1′ , Ar 5 , Ar 6 , Ar 7 and Ar 7″ are independently identical or different to each other, each representing a divalent aromatic or heteroaromatic group having at least one ring; Ar 3 , Ar 4′ and Ar 8 are independently identical or different to each other, each representing a trivalent aromatic or heteroaromatic group having at least one ring; X is identical or different to each other, each representing a group having an oxygen, sulfur or hydrogen atom, a group having 1 to 20 carbon atoms, or an aryl group; 0<a<1, and 0<a′<1; and 1≦m<10,000, 1≦n<10,000, and 1≦k<10,000.