Advertisement

Reactions of polymer analogous model substances with metals and oxides

  • J. Gähde
  • J. Friedrich
  • T. Fischer
  • W. Unger
  • A. Lippitz
  • J. Falkenhagen
Interfaces
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 101)

Abstract

DHC and PCnBE as models of polyurethanes show strong chemical interactions with functional groups at the Al2O3 surface. Degradation of the model compounds occurs by hydrolysis, but DHC decomposes with a higher rate than PCnBE. Addition of water to the coated Al2O3 reduces the decomposition rate by forming a water interlayer, which interrupts the direct interaction at the interface. Blocking the functional groups at the Al2O3 surface by adsorption of a phosphoric acid compound has nearly the same effect and hinders any hydrolysis of the model compound.

Plasma oxidized OTS self-assembling layers, serving as models for polyolefine surfaces, show strong interactions with chromium atoms. One result was the full entanglement of the functionalized alkyl chains, which were preferentially oriented for an untreated OTS self-assembling layer. Strong experimental indications exist for an oxygen transfer from plasma-introduced carboxyl and carbonyl functionalities to chromium atoms which form Cr3+ oxide species.

Key words

Chemical interaction model compounds Al2O3 and chromium molecular orientation formation of complexes plasma 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Gähde J, Goering H, Gehrke R, Hill W (1993) IEEE Trans Magn 29:2101–2107CrossRefGoogle Scholar
  2. 2.
    Bierbaum K (1995) PhD Thesis, University of Heidelberg, GermanyGoogle Scholar
  3. 3.
    Friedrich J, Gross H, Lippitz A, Rohrer P, Saur W, Unger W (1993) Surface Coat Technol 23:267–273Google Scholar
  4. 4.
    Köhler K, Schläpfer CW (1993) Chemie in unserer Zeit 27:248–255CrossRefGoogle Scholar
  5. 5.
    Unger W, Lippitz A, Wöll Ch, Friedrich J, Nick L (1994) Proc EURADH 94, Suppl à la Revue “Le Vide, les Couches Minces” No 272:95–98Google Scholar
  6. 6.
    Beamson G, Briggs D (1992) High Resolution XPS of Organic Polymers — The Scienta ESCA300 Database, J Wiley & Sons, ChichesterGoogle Scholar
  7. 7.
    Friedrich J, Falk B, Loeschcke I, Rutsch B, Richter Kh, Reiner H-D, Throl U, Raubach H (1985) Acta Polymerica 36:310–320CrossRefGoogle Scholar

Copyright information

© Steinkopff Verlag 1996

Authors and Affiliations

  • J. Gähde
    • 1
  • J. Friedrich
    • 1
  • T. Fischer
    • 1
  • W. Unger
    • 2
  • A. Lippitz
    • 2
  • J. Falkenhagen
    • 2
  1. 1.Institut für Angewandte Chemie Berlin-AdlershofBerlinFRG
  2. 2.Bundesanstalt für Materialforschung und-prüfung (BAM)BerlinFRG

Personalised recommendations