Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Poster: Glasses I (jointly with DY)

CPP 14.12: Poster

Dienstag, 27. März 2012, 18:15–20:15, Poster A

Molecular signature of the dynamic glass transition as probed by spectroscopies sensing inter- and intra-molecular interactions — •Wilhelm Kossack¹, Periklis Papadopoulos², and Friedrich Kremer¹ — ¹Fakultät für Physik und Geowissenschaften, Linnéstraße 5, 04103 Leipzig, Germany — ²Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany

The dynamic glass transition reflects a continuous slowing down of relaxations between structural substates of a glass forming system. Conventially its temperature dependence is described by the empirical Vogel-Fulcher-Tammann dependence. In the present study Fourier Transform InfraRed (FTIR) spectroscopy is employed to study the inter-molecular interactions between different molecular moieties of glass forming systems by measuring the temperature dependence of the spectral positions of its characteristic vibrations. In combination with Broadband Dielectric Spectroscopy (BDS) and DC- and AC- calorimetry this delivers a novel detailed insight into the molecular signature of the dynamic glass transition being specific for each glass forming system.