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SYSO: Symposium Self-organizing Surfaces and Interfaces

SYSO 3: Self-Organizing Surfaces and Interfaces - Posters

SYSO 3.9: Poster

Mittwoch, 25. März 2009, 17:30–19:30, P3

Viscosity and density at the polymer-solid interface — •E.Tilo Hoppe, Alexandra Münzer, and Christine M. Papadakis — TU München, Physikdepartment E13, Garching

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

The goal of the project is the investigation of the influence of the polymer-solid interaction on the physical properties of the polymers near the interface. Special interest is dedicated to the correlation in change of density and viscosity of the polymer near the interface. Low molecular weight polybutadiene melt on silicon oxide is studied as a model system. The changes in density and viscosity are investigated by neutron reflectometry and fluorescence correlation spectroscopy. To tune interface interactions between substrate and polymer melt, different substrate surface modifications have been applied and their surface tension components were determined with contact angle measurements.