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Chemical reactions at polymer surfaces interacting with a gas plasma or with metal atoms - their relevance to adhesion

  • The chemical and morphological stabilities of polymer segments in the near-surface layer were investigated by spectroscopic methods such as X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. Model studies were undertaken with Langmuir–Blodgett films, self-assembled monolayers and oligomer films. For thin polymer layers (30 to 500 nm), the changes in molecular-weight distributions of some polymers were investigated systematically by size exclusion chromatography, matrix-assisted laser desorption/ionization–time-of-flight mass spectrometry and thermal-field flow fractionation for oxygen- and helium-plasma exposures. The polymer surfaces were found to be relatively stable at exposure to an oxygen low-pressure plasma up to ca. 2 s. This is important information to get maximum adhesion to metals in composites. In correlation to their redox potentials, potassium, aluminium and chromium react with oxygen functional groups at the polymer/metalThe chemical and morphological stabilities of polymer segments in the near-surface layer were investigated by spectroscopic methods such as X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. Model studies were undertaken with Langmuir–Blodgett films, self-assembled monolayers and oligomer films. For thin polymer layers (30 to 500 nm), the changes in molecular-weight distributions of some polymers were investigated systematically by size exclusion chromatography, matrix-assisted laser desorption/ionization–time-of-flight mass spectrometry and thermal-field flow fractionation for oxygen- and helium-plasma exposures. The polymer surfaces were found to be relatively stable at exposure to an oxygen low-pressure plasma up to ca. 2 s. This is important information to get maximum adhesion to metals in composites. In correlation to their redox potentials, potassium, aluminium and chromium react with oxygen functional groups at the polymer/metal interface. In a dedicated study, chromium was found to attack aromatic rings and form different reaction products.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Jörg Florian Friedrich, Wolfgang Unger, Andreas Lippitz, Ivaylo Koprinarov, Gerhard Kühn, Steffen Weidner, Lydia Vogel
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Surface and coatings technology
Jahr der Erstveröffentlichung:1999
Verlag:Elsevier Science
Verlagsort:Lausanne
Jahrgang/Band:116-119
Erste Seite:772
Letzte Seite:782
DOI:https://doi.org/10.1016/S0257-8972(99)00229-7
ISSN:0257-8972
Verfügbarkeit des Volltexts:Papiergebundenes Belegexemplar in der Bibliothek der BAM vorhanden ("Hard-copy Access")
Bibliotheksstandort:ZS 45
Datum der Freischaltung:19.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:24.02.2005