Polyimide resin and preparation method thereof

According to the polyimide resin and the preparation method thereof provided by the invention, crosslinkable components are added in the preparation process, so that the polyimide resin has crosslinkable functional groups, and the polyimide resin has excellent performances of thermoplastic polyimide resin and thermosetting polyimide resin at the same time; the polyimide resin has the advantages of favorable toughness, favorable processability, favorable mechanical properties and favorable high/low-temperature resistance, improves the usability, and widens the application field of the polyimide resin. 本发明提供了一种聚酰亚胺树脂及其制备方法，通过在制备过程中加入可交联组分，使聚酰亚胺树脂带有可交联官能团，使该聚酰亚胺树脂同时具有热塑性聚酰亚胺树脂和热固性聚酰亚胺树脂的优异性能，既具有良好的韧性和可加工性能，又具有良好的力学性能和耐高低温性能，改善其使用性能，拓宽聚酰亚胺树脂的应用领域。