[1,1′-Biphenyl]-4,4′-diamine, 2,2′-bis(trifluoromethyl)-, polymer with 1H,3H-benzo[1,2-c:4,5-c′]difuran-1,3,5,7-tetrone 1,2,4,5-Benzenetetracarboxylic acid dianhydride-2,2′-di(trifluoromethyl)-4,4′-diaminobiphenyl copolymer 1H,3H-Benzo[1,2-c:4,5-c′]difuran-1,3,5,7-tetrone, polymer with 2,2′-bis(trifluoromethyl)[1,1′-biphenyl]-4,4′-diamine 2,2′-Bis(trifluoromethyl)-4,4′-diaminobiphenyl-pyromellitic anhydride copolymer 2,2′-Bis(trifluoromethyl)-4,4′-diaminobiphenyl-pyromellitic dianhydride copolymer 2,2′-Bis(trifluoromethyl)-4,4′-diaminobiphenyl-pyromellitic dianhydride polymer 2,2′-Bis(trifluoromethyl)benzidine-pyromellitic anhydride copolymer 2,2′-Bis(trifluoromethyl)benzidine-pyromellitic dianhydride copolymer 4,4′-Diamino-2,2′-bis(trifluoromethyl)biphenyl-1,2,4,5-benzenetetracarboxylic acid dianhydride copolymer 4,4′-Diamino-2,2′-bis(trifluoromethyl)biphenyl-pyromellitic dianhydride copolymer Bis(2,2′-trifluoromethyl)biphenyl-4,4′-diamine-pyromellitic dianhydride copolymer PMDA-TFMB copolymer Pyromellitic dianhydride-2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl copolymer Pyromellitic dianhydride-2,2′-bis(trifluoromethyl)benzidine copolymer