Characterization of Interphases between PMDA/4-BDAF Polyimides and Silver and Graphite Substrates Using X-Ray Photoelectron Spectroscopy

Abstract

Interfaces formed by curing the polyamic acid (PAA) of pyromellitic dianhydride (PMDA)/2,2-bis(4-(4-aminophenoxy(-phenyl)-hexa-fluoropropane (4- BDAF) polyimide against silver substrates were characterized by x-ray photoelectron spectroscopy (XPS). The C(ls) multiplex spectra of PAA films cured against thick silver films were more similar to those obtained before curing than to those for the bulk PMDA/4-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 N(1s) spectra was attributed to the amides.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1991
Accession Number
ADA235567

Entities

People

  • F. James Boerio
  • N. G. Cave
  • W. H. Tsai

Organizations

  • University of Cincinnati

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Composite Materials
  • Electrons
  • Films
  • Materials
  • Materials Science
  • Military Research
  • Photoelectrons
  • Polymeric Films
  • Raman Spectroscopy
  • Security
  • Spectra
  • Spectroscopy
  • Substrates
  • Thin Films
  • X Ray Photoelectron Spectroscopy
  • X Rays

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.
  • Reinforced Composite Materials

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene