Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Nanoparticles and Composite Materials

CPP 41.11: Vortrag

Donnerstag, 3. April 2014, 12:15–12:30, ZEU 222

Using the Interplay of Different Techniques to Understand the Microscopic Origin of the Macroscopic Material Behavior — •Gerald Schneider, Thomas Glomann, Jürgen Allgaier, and Dieter Richter — Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science and Institute for Complex Systems, Germany

Intense research has led to substantial progress towards understanding polymer melts and nanocomposites. For that purpose, knowledge of the single chain dynamics is of particular interest. It is important for modeling or predicting the macroscopic material response needed for the target oriented engineering of new hybrid materials starting from the single molecule. It may lead to optimized materials ranging from the classical car tire to battery or fuel cell applications.

In polymer melts, different microscopic processes, such as diffusion, reptation, contour length fluctuations, etc. add up to the total response at the macroscopic length-scale. Additionally, in composites with inorganic nanoparticles hard impenetrable walls impose constraints on polymer melts, by limiting the accessible regions. Such a confinement significantly affects the polymer dynamics when the interparticle distances and the dimensions of the embedding polymer chains are comparable.

The talk illuminates the relationship between the microscopic dynamics and the macroscopic application, exploiting different experimental techniques, such as dielectric spectroscopy, rheology, neutron scattering and spectroscopy.