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.
第种聚酰亚胺聚合物是芳香族四酸
酐与芳香族
异氰酸酯,在有机溶
中,在催化
下,一步法缩合反应制备得到;