SKM 2023 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.54: Poster
Monday, March 27, 2023, 18:00–20:00, P3
Tunable morphologies in charged multiblock terpolymers in thin film geometry: effect of solvent vapor annealing — •Bahar Yazdanshenas1, Florian A. Jung1, Tim Bohnen1, Sina Ariaee2, Dorthe Posselt2, Heinz Amenitsch3, Constantinos Tsitsilianis4, and Christine M. Papadakis1 — 1Technische Universität München, TUM School of Natural Sciences, Soft Matter Physics group, Garching, Germany — 2Roskilde University, Department of Science and Environment, Roskilde, Denmark — 3Graz University of Technology, Institute of Inorganic Chemistry, Graz, Austria — 4University of Patras, Department of Chemical Engineering, Patras, Greece
Thin films of a pentablock terpolymer with an ABCBA architecture of two types of pH-responsive midblocks and short hydrophobic end blocks are investigated. As-prepared spin-coated films from different pH-values have previously shown highly tunable and non-monotonous behavior of the lateral structure sizes, based on the charge [1]. Here, we investigate further accessible morphologies by swelling the films in the vapors of solvents having different selectivity. Results from spectral reflectance, atomic force microscopy, and grazing-incidence small-angle X-ray scattering suggest that a solvent selective for the pH-responsive blocks leaves the nanostructures intact, while a nonselective solvent enables reorganization. Their vapor mixtures are also studied to potentially access further orientations and morphologies. In addition, an ABA triblock copolymer is investigated as a reference. [1] F. A. Jung, C. M. Papadakis et al., Adv. Funct. Mater. 2021, 31, 2102905.