合成了一系列聚酰亚胺模型化合物，用１Ｈ—ＮＭＲ、１３Ｃ—ＮＭＲ和ＩＲ等手段对其结构进行了表征，并用ＴＧ研究了其热性能与结构之间的关系。研究结果表明，核磁共振数据与红外光谱数据在结构表征方面相吻合。这些化合物都具有较高的热稳定性，当引入亚甲基以后，其热稳定性明显降低。同时，提出了通过研究小分子模型化合物性能而预测其对应的聚酰亚胺高聚物热性能关系的设想，探索出合成聚酰亚胺的新途径 A series of polyimide model compounds were synthesized. Their structures were characterized by 1H-NMR, 13C-NMR and IR. The relationship between their thermal properties and their structures was also studied by TG. The results show that the NMR data are in good agreement with the infrared spectra data in the structural characterization. These compounds have high thermal stability, when the introduction of methylene, the thermal stability was significantly reduced. At the same time, the idea of ​​predicting the thermal properties of the corresponding polyimide polymer by studying the properties of the small molecule model compounds was explored, and a new way of synthesizing the polyimide was proposed