Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 11: Glasses II (with CPP, talks by DY)

DY 11.10: Vortrag

Dienstag, 27. März 2012, 12:15–12:30, MA 004

Dielectric polarization noise and permittivity - A fluctuation-dissipation analysis during the curing of an epoxy resin — Clemens Hassel, •Andreas Reiser, and Christian Enss — Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg

Dielectric spectroscopy as a driven method combined with non-driven dielectric noise spectroscopy is a powerful experimental method for studying the fluctuation-dissipation theorem experimentally. We apply both methods during the curing process of the epoxy resin Epon 828 with n-butylamine. Setting the sample temperature properly allows controlling the time scale of curing. We measure in the temperature range between 293 K and 303 K at fixed temperatures. During curing the Epon-n-butylamine mixture undergoes a chemically induced glass transition. We analyze the validity of the fluctuation-dissipation theorem and calculate an effective temperature for this system.