Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: New Perspectives of Scattering at Soft Matter
CPP 30.11: Vortrag
Mittwoch, 28. März 2012, 18:15–18:30, C 264
Investigation of structural changes of polymer surfaces during friction by GISAXS — •Konrad Schneider1, David Nitsche1, and Stephan Roth2 — 1Leibniz-Institut für Polymerforschung Dresden, Germany — 2HASYLAB at DESY Hamburg, Germany
The materials behaviour during friction is not yet well understood. On macro-scale mainly the contact between certain points or asperities happens and wear is observed. Measuring on nano-scale by a SFM mainly topography and local stiffness are mapped. By a new friction device we investigate friction between a well-defined glass sphere and a polymer surface. This surface is created by grafting of polymer layers with thickness of some nm on a wafer. Friction is performed in dependence of normal load. The changes in surface morphology were characterized by GISAXS (grazing incidence small angle X-ray scattering). This enables to monitor flattening and destruction of the polymer layer on the surface as well as the creation of certain ripple structures.