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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 69: Focus: Fundamentals of molecular liquids, ionic liquids and mixtures II
CPP 69.9: Vortrag
Mittwoch, 18. März 2020, 17:45–18:00, ZEU 222
Polysulfobetaines in aqueous solution — Bart-Jan Niebuur1, Jonas Puchmayr1, Viet Hildebrand2, Peter Müller-Buschbaum1,3, André Laschewsky2,4, and •Christine M. Papadakis1 — 1TU München, Physik-Department, Fachgebiet Physik weicher Materie/Lehrstuhl für Funktionelle Materialien, 85748 Garching — 2Institut für Chemie, Universität Potsdam, 14476 Potsdam-Golm — 3Heinz Maier-Leibnitz Zentrum (MLZ), TU München, 85748 Garching — 4Fraunhofer Institut für Angewandte Polymerforschung, 14476 Potsdam-Golm
Polysulfobetaines feature zwitterionic groups in their side groups. In aqueous solution, they show upper critical solution temperature (UCST) behavior. Their clearing point depends sensibly on the detailed molecular structure [1] and is very different in H2O and D2O. For some representatives of this class, the clearing point depends in a non-linear way on salt concentration [2]. Using dynamic light scattering, we investigate the temperature dependence of the diffusional behavior of poly(N,N-dimethyl-N-(3-(methacrylamido)propyl)ammoniopropane sulfonate) in dependence on molar mass and NaBr concentration in aqueous solution and find non-mean-field scaling behavior [3]. We discuss possible reasons for the peculiar behavior.
1. V. Hildebrand et al., Polym. Chem. 2016, 7, 731.
2. V. Hildebrand et al. J. Biomater. Sci., Polym. Ed. 2014, 25, 1602.
3. B.-J. Niebuur et al., Materials 2018, 11, 850.