Regensburg 2022 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 2: Polymer Networks and Elastomers
CPP 2.3: Talk
Monday, September 5, 2022, 10:00–10:15, H39
Surface structure and rheology of amphiphilic co-polymer networks on different length scales — •Kevin Hagmann1, Nora Fribiczer2, Sebastian Seiffert2, Carolin Bunk3, Frank Böhme3, and Regine von Klitzing1 — 1Institute for Condensed Matter Physics, Technische Universität Darmstadt, D-64289 Darmstadt — 2Department of Chemistry, Johannes Gutenberg University Mainz, D-55128 Mainz — 3Leibniz-Institut für Polymerforschung Dresden e.V., D-01069 Dresden
This study focuses on the relation between structure, swelling abilities and mechanical/rheological properties of films of amphiphilic co-polymer networks (ACNs). First, the correlation between different synthesis strategies for gel films and their resulting properties will be described. Secondly, the effect of solvents of different polarity on the swelling ability will be presented on different length scales. For this purpose, topology and near surface structure are studied with atomic force microscopy (AFM) and grazing incidence small angle x-ray scattering (GISAXS), respectively. We also put special emphasis on the determination of mechanical and rheological properties laterally and orthogonally to the gel surface by carrying out dynamic AFM indentation experiments. In order to evaluate heterogeneities the mechanical and rheological behaviour at the interface of the ACNs will be presented on various length scales (nm - µm). The study shows that the synthesis strategy has a strong effect on the gel structure and on nano/microrheological properties. The structure and rheology of gel films will be compared with results obtained of the respective bulk gel.