Berlin 2018 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 63: Polymer and Molecular Dynamics II

CPP 63.1: Talk

Thursday, March 15, 2018, 09:30–09:45, C 264

Local dynamics in polyelectrolyte multilayers and complexes — •Ulrich Scheler — Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str 6, 01069 Dresden, Germany

Relaxation NMR can measure molecular mobility over a wide range of correlation times. The longitudinal relaxation time in the rotating frame (T1rho) is ideally suited for molecular chain motion in the range kiloHertz. If is detected in solid-state NMR with chemical shift resolution, the mobility can be attributed to individual functional groups and thus the mobility of polycation and polyanion in the multilayers or complexes are separated.Thsu dynamic heterogeneity between PDADMAC and PSS in multilayers formed from high-salt solutions has been observed. This is compared to the local mobility in polyelectrolyte complexes formed from the same solutions and those formed from salt-free solutions, exhibiting more homogeneous mobility.