SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster Session II

CPP 6.25: Poster

Dienstag, 28. September 2021, 17:30–19:30, P

Understanding the structure of reversible networks made of star polymers — •Kiran Suresh Kumar1,2, Toni Müller1,2, Jens-Uwe Sommer1,2, and Michael Lang11Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Hohe Strasse 6, 01069 Dresden, Germany — 2Institute für Theoretische Physik, Technische Universität Dresden, Zellescher Weg 17, 01069 Dresden, Germany

Bonds in reversible networks break and form continuously allowing the material to flow and self-heal on long time scales while being a solid on short times. Recent work utilized a regular star branched architecture in combination with a controlled pairwise association of reversible groups to reveal the impact of network defects on the material properties [1-4]. We develop a model for network structure by combining previous work on network defects in irreversible networks [5] with the method of balance equations [6] for reversible systems. The model predictions for the frequency of different star types are tested by Monte Carlo simulations of network structure.

[1] Rossow, T.; Habicht, A.; Seiffert, S. Macromolecules 2014, 51, 6473-6482. [2] Tang, S.; Wang, M.; Olsen , B. D. J. Am. Chem. Soc. 2015, 137, 3946-3957. [3] Tang, S.; Habicht, A.; Li, S.; Seiffert, S.; Olsen, B. D. Macromolecules 2016, 49, 5599-5608. [4] Ramirez, J.; Dursch, T. J.; Olsen , B. D. Macromolecules 2018, 51, 2517-2525. [5] Lang, M.; Schwenke, K.; Sommer, J.-U. Macromolecules 2012, 45, 4886- 4895. [6] Lang, M.; Kumar, K. S. Macromolecules 2021, 10.1021/acs.macromol.1c00718.

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