Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session 2

CPP 37.54: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P3

Core-Shell Brush Copolymers with Poly(propylene oxide)-b-poly(ethylene oxide) Side Chains — •Christina Psylla¹, Konstantinos Kyriakos¹, Junpeng Zhao², Stergios Pispas², and Christine M. Papadakis¹ — ¹TU München, Physik-Department, Garching — ²Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece

Graft copolymers with densely grafted side chains are known as brush copolymers. Brush copolymers with poly(p-hydroxystyrene) (PHOS) as the backbone and poly(propylene oxide) (PPO) and poly(ethylene oxide) (PEO) in the side chains, have recently been synthesized and show micelle formation as well as thermoresponsive behavior in aqueous solution [1]. Their multibranched molecular structure may affect their micellization behavior in aqueous solution compared to simple diblock copolymers but also their self-assembly in the bulk.

We report here on small-angle and wide-angle X-ray scattering experiments on several copolymers of various architectures and compositions, carried out in a wide temperature range. In the bulk, significant effects of the chain architecture, i.e. the sequence of PEO and PPO in the side chains and whether the side chains are diblock or random copolymers, and the volume fraction of PPO on the crystalline structure of the PEO block and on the microphase formation are observed.

[1] J. Zhao et al. Macromolecules 43, 1771 (2010)