1,3-Isobenzofurandione, 5,5′-oxybis-, polymer with 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis[benzenamine] 2,2-Bis(4-aminophenyl)hexafluoropropane-4,4′-oxydiphthalic anhydride copolymer 2,2-Bis(4-aminophenyl)hexafluoropropane-oxydiphthalic anhydride copolymer 4,4′-(Hexafluoroisopropylidene)dianiline-4,4′-oxydiphthalic anhydride copolymer 4,4′-Oxydiphthalic anhydride-4,4′-(hexafluoroisopropylidene)dianiline copolymer Benzenamine, 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis-, polymer with 5,5′-oxybis[1,3-isobenzofurandione]