1,2,4,5-Benzenetetracarboxylic 1,2:4,5-dianhydride, polymer with 4,4′-[sulfonylbis(p-phenyleneoxy)]dianiline 1H,3H-Benzo[1,2-c:4,5-c′]difuran-1,3,5,7-tetrone, polymer with 4,4′-[sulfonylbis(4,1-phenyleneoxy)]bis[benzenamine] 4,4′-Bis(4-aminophenoxy)diphenyl sulfone-pyromellitic dianhydride copolymer Aniline, 4,4′-[sulfonylbis(p-phenyleneoxy)]di-, polymer with 1,2,4,5-benzenetetracarboxylic 1,2:4,5-dianhydride Benzenamine, 4,4′-[sulfonylbis(4,1-phenyleneoxy)]bis-, polymer with 1H,3H-benzo[1,2-c:4,5-c′]difuran-1,3,5,7-tetrone Bis[4-(4-aminophenoxy)phenyl] sulfone-pyromellitic anhydride copolymer Bis[4-(4-aminophenoxy)phenyl]sulfone-pyromellitic dianhydride copolymer Bis[4-aminophenoxyphenyl]sulfone-pyromellitic dianhydride copolymer Pyromellitic acid anhydride-4,4′-[sulfonylbis(p-phenyleneoxy)]dianiline copolymer Pyromellitic dianhydride-4,4′-[sulfonylbis(p-phenyleneoxy)]dianiline copolymer SED-pyromellitic dianhydride copolymer