Regensburg 2010 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 35: Poster: Glasses and Glass Transition

CPP 35.3: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster B2

Signatures in glassy dynamics of molecular liquids and polymers — •Tilman Schubert, Joshua Sangoro, Ciprian Iacob, and Friedrich Kremer — Institute of Experimental Physics I, University of Leipzig, Linnést. 5, 04103 Leipzig, Germany

Charge transport and glassy dynamics in a variety of amorphous materials are investigatet by Broadband Dielectric Spectroscopy (BDS). Despite the apparently similar Vogel - Fulcher - Tamann - type thermal activation of the characteristic quantities (structural alpha-relaxation rate, diffusion rate and dc conductivity), significant discrepancies are revealed upon application of a model-free derivative technique. Detailed analysis of the dielectric strength and the type of its temperature dependence shows distinct characteristics caused by the differences in the type of molecular interactions involved in the materials studied.