Cited by 49Electron and X-Ray Spectroscopy TechniquesX-ray Spectroscopy and Fluorescence AnalysisSynthesis and properties of polymers

Molecular orbital analysis of the XPS spectra of PMDA‐ODA polymide and its polyamic acid precursor

Silverman, B. D., Bartha, J. W., Clabes, J. G., Ho, P. S., Rossi, A. R.·1986·Journal of Polymer Science Part A: Polymer Chemistry

Abstract

The calculated carbon 1s (C1s) core energy‐level positions of PMDA‐ODA polymide and of its polyamic acid precursor are compared with the level positions inferred from XPS measurements. For the polyamic acid, calculation and experiment both yield a difference of approximately 1 eV between the carboxylic acid and the amide carbonyl C1s level positions. The difference in shape between the main C1s XPS peaks of the polyamic acid and polyimide is shown to be related to the difference in C1s core energy‐level shifts of the carbon atoms composing the benzene ring adjacent to the amide or imide group. The planar imide or PMDA structure apparently yields larger core level shifts for these atoms. We have previously designated these atoms as “imide carbon atoms” (C‐Im) to distinguish them from the aromatic carbon atoms (C‐C) of the ODA part of the polymeric repeat unit. Comparison of the carbonyl XPS band intensities with the main peak intensities for the polyamic acid, as well as for the polyimide, suggests that there is a carbonyl deficiency at the surface of both of these materials.

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Crossref · 10.1002/pola.1986.080241216

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11 of 11 references verified0 citation errors · 0 not checkable

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  • ATR-FTIR spectra of II-Kapton show an obvious new peak at around 3350 cm−1, attributed to the breaking of the C─N bond and the formation of a new N─H bond.

    “As shown in Fig. 2C and fig. S4A, the ATR-FTIR spectra of II-Kapton, an obvious new peak appears at around 3350 cm−1, which is attributed to the breaking of the C─N bond (40, 41) and the formation of new N─H bond.”

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Authors
Silverman, B. D., Bartha, J. W., Clabes, J. G., Ho, P. S., & Rossi, A. R.
Affiliations
  • IBM Research - Thomas J. Watson Research Center (US)
  • University of Connecticut (US)
Venue
Journal of Polymer Science Part A: Polymer Chemistry
Publisher
Wiley
Published
1986-12
Volume
24
Issue
12
Pages
3325-3333
ISSN
  • 0887-624X (ISSN-L)
  • 1099-0518
OpenAlex
W2120582491
Cited by
49
References
11
Citations by year
2026: 1 · 2025: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2016: 1
FWCI
0.66
Type
journal article
Language
en
Open access
closed
Locations
Journal of Polymer Science Part A Polymer Chemistry (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Electron and X-Ray Spectroscopy Techniques
  • Physical Sciences › Physics and Astronomy › Radiation › X-ray Spectroscopy and Fluorescence Analysis
  • Physical Sciences › Materials Science › Polymers and Plastics › Synthesis and properties of polymers
Keywords
PMDA-ODA polyimide, molecular orbital analysis, amide carbonyl, surface chemistry

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