1,3-Benzenedicarboxylic acid, 1,4-benzenedicarboxylic acid, 1,2-ethanediol polymer 1,3-Benzenedicarboxylic acid, polymer with 1,4-benzenedicarboxylic acid and 1,2-ethanediol 137178-44-0 151853-99-5 213481-96-0 24938-04-3 58543-50-3 59268-48-3 Polyethylene terphthalate - polyethylene isophthalate film