Berlin 2001 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 19: Poster: New Methods, Thin Polymer Films, Monolayers

CPP 19.18: Poster

Donnerstag, 5. April 2001, 12:30–15:00, AT1

Investigation of the surface glass transition of polymeric glasses probed by the embedding of noble metal nanoclusters — •J. Erichsen, K. Dolgner, V. Zaporojtchenko, T. Strunskus, and F. Faupel — Technische Fakultät der Christian-Albrechts-Universität zu Kiel, Lehrstuhl für Materialverbunde, Kaiserstraße 2, 24143 Kiel

X-ray photoelectron spectroscopy (XPS) has been applied to study the embedding of Au and Cu nanoclusters into Bisphenol-A-Polycarbonate (BPA-PC) and into polystyrene with different molecular weight and film thickness. It was shown that the temperature dependence of the embedding depth can be used to determine the glass-transition temperature at the polymer surface. We found a depression of the surface glass transition temperature compared with that of the bulk sample. This temeprature was measured as a function of molecular weight, film thickness and heating rate.