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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Poster: Interfaces and Thin Films

CPP 14.16: Poster

Monday, March 22, 2010, 16:30–18:00, Poster C

Density and Viscosity at the polymer-solid interface — •Eicke Tilo Hoppe, David Magerl, and Christine M. Papadakis — TU München, Physikdepartment E13, Garching

Close to the interface between a polymer film and a solid, the polymer properties may deviate from the bulk. This change in physical behavior is of importance for the adhesion of polymer coatings to solids, e.g. in medical implants or in paints.

The aim of the project is the investigation of the influence of the polymer-solid interaction on the physical properties of the polymers near the interface. The focus lies in the correlation between the change of density and viscosity of the polymer near the interface.

Polybutadiene melts on dry thermally oxidized silicon are studied as a model system. The changes in density and viscosity are investigated by neutron reflectometry and fluorescence correlation spectroscopy. To tune the interface interactions between substrate and polymer melt, the substrate surface is modified by different silanizations.