Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 42: Gels, Polymer Networks and Elastomers III
CPP 42.3: Vortrag
Donnerstag, 21. März 2024, 15:30–15:45, H 0106
Exploring Hydration Mechanisms in Poly(N-isobutyramide) and its Isomer, Poly(N-isopropylacrylamide) — •Morgan P. Le Dû1, Julija Reitenbach1, David P. Kosbahn1, Lukas V. Spanier1, Cristiane Henschel2, André Laschewsky2, Robert Cubitt3, Christine M. Papadakis4, and Peter Müller-Buschbaum1,5 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2Fraunhofer IAP, 14476 Potsdam, Germany — 3ILL, 38000 Grenoble, France — 4TUM School of Natural Sciences, Soft Matter Physics, 85748 Garching, Germany — 5MLZ, TUM, 85748 Garching, Germany
Thermo-responsive polymers hold a prominent position due to the easy access to the temperature parameter. This study investigates Poly(N-isobutyramide) (PNVIBAM) and compares it with its structural isomer, Poly(N-isopropylacrylamide) (PNIPAM). PNVIBAM exhibits a slightly higher LCST than PNIPAM in aqueous solutions. This makes PNVIBAM particularly well-suited for applications requiring tempera- ture sensitivity to the human body. We investigate the swelling behav- ior of both polymers when used as thin films and exposed to high humidity conditions. Swelling characteristics are obtained via spectral reflectance and in situ FTIR is used to explore the hy- dration mechanisms in both polymers. Neutron reflectometry (NR) offers crucial insights into their equilibrium swollen state and water content. This research contributes to the understanding of PNVIBAM and PNIPAM properties regarding their hydrophilic behaviour.
Keywords: hydrogels; polymer; hydration; thin films; neutron reflectometry