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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 4: Responsive and Adaptive Systems (joint session CPP/DY)

CPP 4.2: Vortrag

Montag, 1. April 2019, 09:45–10:00, H8

Morphology of Thermoresponsive Molecular Brushes with Copolymer Side Arms in Aqueous Solution — •Jia-Jhen Kang¹, Junpeng Zhao², Henrich Frielinghaus³, Lester Barnsley³, Fabian Kohler¹, Hendrik Dietz¹, Stergios Pispas², and Christine M. Papadakis¹ — ¹TU München, Physik-Department, Garching, Germany — ²National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, Athens, Greece — ³FZ Jülich, JCNS at MLZ, Garching, Germany

Poly (ethylene oxide) (PEO) and poly (propylene oxide) (PPO) are known to be thermoresponsive polymers both exhibiting lower critical solution temperature (LCST) behavior, with the cloud points >100 °C and 8 °C, respectively. In the present work, we aim to investigate the LCST behavior of their densely-grafted analogues, namely molecular brushes, which are polymers composed of a polymeric backbone and side arms attached to virtually every monomer of the backbone. Molecular brushes with PEO-ran-PPO and PEO-block-PPO copolymer side arms were studied in aqueous solution using dynamic light scattering (DLS) and small angle neutron scattering (SANS). They display mixed LCST behavior based on the two components, indicating new properties induced by the densely-grafted architecture.