Polyimide foams were prepared from poly(ester-amine salt) precursor powder through a foaming process, using aromatic dianhydride and diamine as monomers.
以芳香二酐和二胺为单体，采用聚酯铵盐前体粉末发泡的方法制备聚酰亚胺泡沫材料。
2
The composition, the molecular and the characteristics of polyimide (PI) fiber as a precursor of carbon fibers were introduced.
介绍了作为碳纤维前驱体的聚酰亚胺（PI）纤维的组成、分子结构和特性；
3
The closed cell polyimide foams were fabricated by foaming the precursor balloons, and the foams' acoustic absorption properties were tested.