Polyimide precursor composition, preparation method of polyimide and polyimide

The present invention relates to a polyimide precursor composition, a method for preparing a polyimide, and polyimide. The polyimide precursor composition contains polyamic acid and a monomeric compound. The polyamic acid is prepared from a monomer mixture by a first reaction, wherein the monomer mixture comprises a diamine compound and a dianhydride compound. The aforementioned monomeric compound has two carboxyl groups and two ester groups. The prepared polyimide precursor composition can be further reacted to obtain a polyimide having good mechanical properties and film properties. 本发明有关于种聚酰亚胺前驱物组合物、聚酰亚胺的制备方法及聚酰亚胺。此聚酰亚胺前驱物组合物包含聚酰胺酸及单体化合物。前述聚酰胺酸是由单体混合物经第反应所制得，其中此单体混合物包含二胺化合物与二酐化合物。前述的单体化合物具有两个羧基及两个酯基。所制得的聚酰亚胺前驱物组合物可进步反应制得具有良好机械性质与薄膜性质的聚酰亚胺。