A kind of new diamine monomer of modified polyimide with piperazine was synthesized, which has been used in the synthesis of modified polyimide by ternary copolymerization.

• 合成一种含哌嗪的芳香族二胺单体,将其用于聚酰亚胺的三元共聚中,并制成改性聚酰亚胺膜。