Synonyms: 3,3',4,4'-Biphenylenetetracarboxylicdianhydride p-phenylenediamine copolymer, polyamic acid;3,3',4,4'-Biphenyltetracarboxylic acid anhydride-p-phenylenediamine copolymer,SRU; 3,3',4,4'-Biphenyltetracarboxylic acid dianhydride-p-phenylenediaminecopolymer, polyamic SRU; 3,3',4,4'-Biphenyltetracarboxylic aciddianhydride-p-phenylenediamine copolymer, polyamic acid SRU;3,3',4,4'-Biphenyltetracarboxylic dianhydride-p-phenylenediamine copolymer,SRU; 3,3',4,4'-Biphenyltetracarboxylic dianhydride-p-phenylenediaminecopolymer, SRU polyamic acid; 3,3',4,4'-Biphenyltetracarboxylicdianhydride-p-phenylenediamine copolymer, polyamic acid SRU;3,4,3',4'-Biphenyltetracarboxylic dianhydride-p-phenylenediamine copolymerpolyamic acid sru; Biphenyltetracarboxylic dianhydride-p-phenylenediamine copolymer,sru polyamic acid;Poly[imino-1,4-phenyleneiminocarbonyl(4,4'-dicarboxy[1,1'-biphenyl]-3,3'-diyl)carbonyl];Poly[imino-1,4-phenyleneiminocarbonyl(ar,ar'-dicarboxy[1,1'-biphenyl]-4,4'-diyl)carbonyl]