[Seminar] P3S Webinar: Polymer dynamics

P3S Webinar by Institute of Physics, MLU
Thursday, October 15^th, 2020, 4 pm CEST

The online meeting takes places via zoom. More information: http://www.physik.uni-halle.de/fachgruppen/nmr/p3s-webinar/upcoming-p3s-webinars/

Dr. Whitney Loo
Chemical and Biomolecular Engineering, UC Berkely, U Chicago
Polymer dynamics in block copolymer electrolytes detected by neutron spin echo spectroscopy

We investigated the effect of salt concentration on the  polymer dynamics of a nanostructured block copolymer electrolyte on the  0.1-100 ns time-scale using the Rouse and reptation tube model. In this  talk, I will demonstrate how quantifying chain motion in the presence of  ions is essential for predicting the behavior of  polymer-electrolyte-based batteries operating at large currents.

Prof. Dr. Michael Vogel
Dept. of Physics, Solid-State Physics, Technische Universität Darmstadt
NMR studies of rotational and translational diffusion in polymer electrolytes and ionic liquids

In my talk, I will combine manifold NMR methods to study rotational dynamics and translational diffusion in polymer electrolytes and ionic liquids in broad ranges of time and length scales. In particular, I will discuss to which extent nanoscopic concentration fluctuations in these mixtures affect the relation of local and diffusive dynamics for the individual constituents and, thus, the transport mechanisms.