Excimer laser (λ = 193 nm) versus AlKα X-Ray damages on polymer surfaces: an XPS (core and valence levels) analysis of polytetrafluoroethylene, polypropylene and polyethylene

Jean-Jacques Pireaux, R. de Meulemeester, E.M. Roberfroid, Chantal Grégoire, M. Chtaïb, Yvan Novis, Joseph Riga, Roland Caudano

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Résumé

The characterization of surface modifications of polymers, after irradiation with X-ray or UV photons, is abundant in the XPS literature, reporting from core level analysis the modification of surface chemical composition (loss of fluorine, or chlorine, or oxygen … content). This work focuses on the use of XPS valence band spectra to show that irradiation can lead to superficial structural modification — lateral chain grafting, or crosslinking — of so-called “reactive” (polytetrafluoroethylene) and even more “stable” (polypropylene and polyethylene) polymers: this is best evidenced by modification of the typical shape of the C2s valence band. This structural modification appears more pronounced for high fluence UV excimer laser irradiation in air, than for (more moderate) exposition to harder X-rays in vacuo.
langue originaleAnglais
Pages (de - à)186-191
Nombre de pages6
journalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume105
Les DOIs
Etat de la publicationPublié - 1995

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