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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. Papadakis11Technische 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.

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