Dresden 2003 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 20: POSTER A

CPP 20.4: Poster

Montag, 24. März 2003, 19:00–21:00, ZEU/250

Radical Determination of Plasma Treated Polymer Surfaces — •Andreas Selinger, Markus Bach, Karsten Küpper, and Manfred Neumann — Universität Osnabrück, Fachbereich Physik, Barbarastrasse 7, 49069 Osnabrück

Plasma treatments play an important role in industrial polymer processing. However, these treatments need further investigation because in most cases the industrial focus lies on process optimization instead of precise characterisation of the surface effects. Therefore we analyse these plasma induced surface effects, especially radical reactions. Our experimantal setup provides on one side a microwave plasma whose inner parameters of particles can be measured by a Langmuir probe. To describe some significant effects in the surface region a passivation of the radicals by nitrogen monoxide is done. These nitrogen groups cannot be found in the original sample and so operate as chemical labels. Then with x-ray photoelectron spectroscopy (XPS) it is possible to investigate the chemical shift of the nitrogen binding energy for the resulting groups and to distiguish different types of radicals.