Dresden 2026 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster II
CPP 46.31: Poster
Thursday, March 12, 2026, 09:30–11:30, P5
A micellar solution from thermoresponsive block copolymers during pressure jumps — •Yandong Wang1, Geethu P. Meledam1, Leonardo Chiappisi2, Cristiane Henschel3, André Laschewsky3,4, Alfons Schulte5, and Christine M. Papadakis1 — 1TUM School of Natural Sciences, Soft Matter Physics Group, Garching, Germany — 2ILL, Grenoble, France — 3Universität Potsdam, Germany — 4Fraunhofer IAP, Potsdam-Golm, Germany — 5University of Central Florida, Orlando, U.S.A.
The diblock copolymer PMMA-b-PNIPAM, consisting of a hydrophobic poly(methyl methacrylate) and a thermoresponsive poly(N-isopropylacrylamide) block, forms core-shell micelles in dilute aqueous solution at atmospheric temperature. These micelles aggregate upon heating or applying pressure. Previous studies have shown that the micellar shell remains hydrated in the two-phase region under high pressure, in contrast to the strongly dehydrated micelles observed in the two-phase region at atmospheric pressure [1]. In this work, we analyzed the micellar transition kinetics during rapid pressure jumps using time-resolved small-angle neutron scattering (SANS). The system was driven from the one-phase region into the two-phase region at target pressures in both low- and high-pressure regimes.
[1] P. A. Alvarez Herrera et al., Macromolecules 2024, 57, 10263.
Keywords: PNIPAM; Thermoresponsive polymers; Neutron Scattering; Pressure resolved study