Berlin 2024 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster I

CPP 15.16: Poster

Monday, March 18, 2024, 18:00–20:00, Poster C

Conformation of star-like molecular brushes with amphiphilic diblock copolymer side arms — •Wenqi Xu¹, Laura Fietzke², Feifei Zheng¹, Montserrat Roman-Quintero¹, Peiran Zhang¹, Dmytro Soloviov³, Rainer Jordan², and Christine M. Papadakis¹ — ¹TUM School of Natural Sciences, Technical University of Munich, Garching, Germany — ²Faculty of Chemistry and Food Chemistry, Technical University of Dresden, Germany — ³EMBL at DESY, Hamburg, Germany

Poly(2-oxazoline)s are considered versatile platforms for biomedicine thanks to their biocompatibility and rich architectural possibilities. While linear brushes with amphiphilic copolymer sidearms from poly(2-oxazoline)s have been amply investigated, studies on star-like brushes are still scarce. In the present work, we investigate molecular brushes, in which diblock copolymers from hydrophilic methyl(2-oxazoline) and hydrophobic n-butyl(2-oxazoline) are grafted onto star-shaped poly(methyl methacrylate) backbones having functionalities ranging from 2 to 5. The size and shape of the star brushes were investigated in dilute aqueous solutions using dynamic light scattering and synchrotron small-angle X-ray scattering. Our results show that the star brushes are ellipsoids whose degree of elongation depends on the functionality and the relative length of the backbone.

Keywords: polyoxazoline; amphiphilic copolymer; polymer solution; complex architecture