Synonyms: POLY(3,3’,4,4’-BIPHENYLTETRACARBOXYLIC DIANHYDRIDE-CO-1,4-PHENYLENEDIAMINE),AMIC ACID;[5,5’-Biisobenzofuran]-1,1’,3,3’-tetrone,polymerwith1,4-benzenediamine;[5,5’-biisobenzofuran]-1,1’3,3’-tetrone,polymerwith1,4-benzenediamine;poly(biphenyltetracarboxylicdianhydride-co-pheny;Poly(3,3,4,4-biphenyltetracarboxylic dianhydride-co-1,4-phenylenediamine), amic acid (solution);POLY(BIPHENYLTETRACARBOXYLIC DIANHYDRIDE- CO-PHENYLENEDIAMINE), AMIC ACID (SOLN);BIPHENYL DIANHYDRIDE-P-PHENYLENEDIAMINE COPOLYMER;4,4’-biphthalic anhydride/ p-phenylenediamine copolymer