In this research a novel copolyimide was synthesized with aliphatic diamine, which composed of 3,3ʹ4,4ʹ-Benzophenonetetracarboxylic dianhydride (BTDA), 4,4ʹ-Oxydianyline (ODA) and 4,9-dioxa-1,12-dodecacanediamine monomers. Synthesis was performed...