N,N′-Di-(4-anilino)-1,2,4,5-benzene bis(dicarboximide) was prepared in a three-step synthesis and purified by heating the resulting solid to 200°C. Condensation of the diaminodiimide with several dianhydrides (BPDA, BTDA, and 6-FDA) yielded polyamic acid-imides that could be either thermally or chemically cured to the corresponding alternating copolyimides. Imidization of the polyamic acid-imide to the final polyimide was monitored by FTIR for samples coated on silicon wafers before being thermally cured. Polyimides prepared by chemical imidization were found by thermogravimetric analysis to be stable to temperatures of 600°C.
|Number of pages||9|
|Journal||Journal of Polymer Science, Part A: Polymer Chemistry|
|State||Published - 30 Jan 1997|
- N,N′-bis-(4-anilino)-1,2,4,5-benzene bis(dicarboximide)
- Polyimide alternating copolymers