Polyimide foams were prepared from poly(ester-amine salt) precursor powder through a foaming process, using aromaticdianhydride 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
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.