Synonyms: Poly[(1,3-dioxo-2,5-isoindolinediyl)carbonyloxy-p-phenyleneoxycarbonyl(1,3-dioxo-5,2-isoindolinediyl)-p-phenyleneoxy-p-phenylene](8CI); 4,4'-Diaminodiphenyl ether-p-phenylene bis(trimellitate anhydride)polymer, SRU; 4,4'-Diaminodiphenyl ether-p-phenylenebistrimellitate polymer,SRU; 4,4'-Oxydianiline-p-phenylene trimellitate dianhydride copolymer, SRU;4,4'-p-Phenylene 1,2,4-benzenetricarboxylate dianhydride-4,4'-oxydianilinepolymer, SRU; 4,4'-p-Phenylene trimellitate dianhydride-4,4'-oxydianilinepolymer, polyimide SRU; PEI II