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DY: Fachverband Dynamik und Statistische Physik

DY 17: Complex Fluids - organized by Christine M. Papadakis (Technical University of Munich, Garching) (joint session CPP/DY)

DY 17.12: Talk

Tuesday, March 23, 2021, 15:00–15:20, CPPb

Charge-Dependent Microphase Separation in Thin Films from a Multiresponsive Pentablock Quaterpolymer — •Florian A. Jung¹, Dorthe Posselt², Detlef-M. Smilgies³, Panayiota A. Panteli⁴, Constantinos Tsitsilianis⁵, Costas S. Patrickios⁴, and Christine M. Papadakis¹ — ¹Physics Department, Soft Matter Group, Technical University of Munich, Garching, Germany — ²Department of Science and Environment, Roskilde University, Roskilde, Denmark — ³Wilson Laboratory, Cornell University, Ithaca, USA — ⁴Department of Chemistry, University of Cyprus, Nicosia, Cyprus — ⁵Department of Chemical Engineering, University of Patras, Greece

Multiblock copolymers and block copolymers with charged segments are attractive candidates for tunable self-assembly of complex morphologies, but their understanding is still at an early stage. In this contribution, we present an investigation of the self-assembly behavior of a pentablock quaterpolymer with (C- co-D)-A-B-A-(C- co-D) architecture containing ionizable A blocks in thin films using grazing-incidence small-angle X-ray scattering (GISAXS). The two-dimensional scattering patterns were analyzed using simulations combined with a multi-step fitting procedure. Furthermore, we performed in-situ swelling experiments to explore the impact of solvents with different selectivities and polarities on the morphology. We find that varying the degree of ionization of the ionizable blocks allows altering of the segregation strength between the blocks. The nature of the solvent used for swelling gives the opportunity to tune the structures in a wide range.