苯四酸二酐与芳香二胺反应制得的芳香族聚酰亚胺，具有高耐热应力，用于制造内燃机部件。
An aromatic polyimide made by reacting pyromellitic dianhydride with an aromatic diamine; has high resistance to thermal stresses; used to made components of internal combustion engines.
第二种聚 酰亚胺聚合物是芳香族四酸二酐与芳香族二异氰酸酯，在有机溶剂中，在催化剂的作用下，一步法缩合反应制备得到；
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.
第二种聚 酰亚胺聚合物是芳香族四酸二酐与芳香族二异氰酸酯，在有机溶剂中，在催化剂的作用下，一步法缩合反应制备得到；
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.
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