1,3-Dicyanobenzene-3,3′,4,4′-tetraaminobiphenyl copolymer, SRU 2,2′-m-Phenylene-5,5′-bibenzimidazole polymer, SRU 3,3′-Diaminobenzidine-isophthaldiamide copolymer, SRU 3,3′-Diaminobenzidine-isophthalic acid copolymer, SRU 3,3′-Diaminobenzidine-isophthalonitrile polymer, SRU 3,3′-Diaminobenzidine-isophthaloyl chloride copolymer, SRU Aurorez Celazole Celazole S 10 Celazole S 26 Cerazol Cerazole Diphenyl isophthalate-3,3′,4,4′-tetraaminobiphenyl copolymer, SRU Diphenyl isophthalate-3,3′,4,4′-tetraaminobiphenyl polymer, SRU Diphenyl isophthalate-3,3′,4,4′-tetraaminodiphenyl polymer, SRU Fumion APH Isophthalic acid-3,3′,4,4′-tetraaminobiphenyl copolymer, SRU Isophthalic acid-3,3′,4,4′-tetraminobiphenyl copolymer, sru Isophthalic acid-3,3′,4,4′-tetraminobiphenyl polymer, sru Poly([5,5′-bi-1H-benzimidazole]-2,2′-diyl-1,3-phenylene) Poly([5,5′-bibenzimidazole]-2,2′-diyl-m-phenylene) Poly([6,6′-bi-1H-benzimidazole]-2,2′-diyl-1,3-phenylene) Poly([bi-1H-benzimidazole]-2,2′-diyl-1,3-phenylene) Poly(1H-benzimidazole-5,2-diyl-1,3-phenylene-1H-benzimidazole-2,5-diyl) Poly(2,2′-m-phenylene-5,5′-bibenzimidazolediyl) Poly(5,5′-bibenzimidazole-2,2-diyl-m-phenylene) Poly(5,5′-bibenzimidazole-2,2′-diyl-1,3-phenylene) Poly(m-phenylenebisbenzimidazole) Poly[2,2′-(1,3-phenylene)-5,5′-bibenzimidazole] Poly[2,2′-(m-phenylene)-5,5′-bibenzimidazole] Poly[2,2′-(m-phenylene)-5,5′-bisbenzimidazole] Poly[2,2′-(m-phenylene)-5,5′-dibenzimidazole]