The second polyimide polymer is prepared with aromatic tetracid dihydride and aromatic diisocyanate and through a one-step condensation reaction in organic solvent and under the action of catalyst.
第种聚酰亚胺聚
芳香族四酸
芳香族
异氰酸酯,在有机溶剂中,在催化剂的作
下,一步法缩
反应制备得到;