Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Nanoparticles and Composite Materials
CPP 12.23: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
Broadband Dielectric Spectroscopy and Rheology on Polyisoprene Silica Nanocomposites — •Adrian Hamm1, Gerald J. Schneider2, Lutz Willner1, Wim Pyckhout-Hintzen1, Reiner Zorn1, and Dieter Richter1 — 1Jülich Centre for Neutron Science JCNS-1, Jülich, Deutschland — 2Jülich Centre for Neutron Science JCNS-FRM-II, Garching, Deutschland
Even though polymer nanocomposites have been playing a crucial role in our daily life for many years, the microscopic origin of the material properties is not fully understood. Therefore, we performed dielectric spectroscopy and rheology experiments on simple model-like polyisoprene silica nanocomposites.
In general, the response of polymer melts to an external perturbation, such as an electric field or a mechanical stress, causes a signal that depends on the sample and on the method. Even in case of identical samples, the measured relaxation function can be different and thereby reveal different details on the molecular origin of the measured values. In our contribution, we demonstrate how to ascribe the different relaxation functions measured by rheology and by broadband dielectric spectroscopy in nanocomposites to the different origins inherent with the different methods.