SKM 2021 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 6: Poster Session II
CPP 6.5: Poster
Tuesday, September 28, 2021, 17:30–19:30, P
Effects of polymer block length asymmetry and temperature on the nanoscale morphology of thermoresponsive double hydrophilic block copolymers in aqueous solutions — •Apostolos Vagias1, Aris Papagiannopoulos2, Lucas P. Kreuzer1, Despoina Giaouzi2, Sebastian Busch3, Stergios Pispas2, and Peter Müller-Buschbaum1,4 — 1Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, 85748 Garching, Germany — 2Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 11635 Athens, Greece — 3German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon, 85748 Garching, Germany — 4Technische Universität München, Physik- Department, Lehrstuhl für Funktionelle Materialien, James-Franck- Str. 1, 85748 Garching, Germany
We combine Fourier transform infrared (FTIR) spectroscopy and small angle neutron scattering (SANS) to identify block length asymmetry and temperature effects on the nanoscale assemblies of novel thermoresponsive double hydrophilic poly(N-isopropylacrylamide)-block-poly(oligo ethylene glycol methyl ether acrylate) (PNIPAM-b-POEGA) diblock copolymers. Morphological transformations from hierarchical assemblies to more well-defined spherical morphologies were identified upon heating. Alteration in the PNIPAM block length induces differences in the strength and/or amount of hydrogen bonding and hydrophobic interactions and molecular solvation.