Characterization of Interphases between PMDA/4-BDAF Polyimides and Silver and Graphite Substrates Using X-Ray Photoelectron Spectroscopy
CINCINNATI UNIV OH DEPT OF MATERIALS SCIENCE AND ENGINEERING
Pagination or Media Count:
Interfaces formed by curing the polyamic acid PAA of pyromellitic dianhydride PMDA2,2-bis4-4-aminophenoxy-phenyl-hexa-fluoropropane 4- BDAF polyimide against silver substrates were characterized by x-ray photoelectron spectroscopy XPS. The Cls multiplex spectra of PAA films cured against thick silver films were more similar to those obtained before curing than to those for the bulk PMDA4-BDAF polyimide, indicating that curing of the polymer was inhibited by interaction of the PAA with the silver substrate. This was evidenced by observing a peak shifted upward by 3.2 eV from the main carbon peak near 284.6 eV which consisted of two overlapping peaks characteristic of the amide and carboxylate groups. Moreover, the main peak observed near 400.4 eV in the N1s spectra was attributed to the amides.
- Organic Chemistry