SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 58: Polymer Networks and Elastomers
CPP 58.5: Vortrag
Freitag, 31. März 2023, 10:45–11:00, ZEU 255
Structure, phase behavior and mechanical properties of the surface of amphiphilic co-polymer networks — •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
The underlying study focuses on the structure, phase separation and mechanics of the surface of amphiphilic co-polymer networks (ACNs).[1] The amphiphilic networks are synthesized from tetrameric star-shaped polymers, combining tetra-poly(ethylene glycol) (hydrophilic) and tetra-poly(є-caprolactone) (hydrophobic) to form a 3D gel network. The topology and near surface structure of the networks are studied with atomic force microscopy (AFM). We put special emphasis on AFM phase imaging under various solvent conditions to identify nanophase separation at the interface. Additionally, we like to present the relation between surface structure and swelling and the resulting mechanical and rheological properties laterally and orthogonally to the gel surface of ACNs. In order to evaluate heterogeneities and phase separation, the mechanical and rheological behavior at the interface of the ACNs will be presented on various length scales (nm - µm). The study shows that the environmental conditions have a strong effect on the gel structure and on nano/microrheological properties. [1] Hagmann et al.; Polymers 2022.