Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Poster Session I

CPP 20.32: Poster

Montag, 12. März 2018, 17:30–19:30, Poster A

Dynamic Properties of Multiblock Copolymers — •Fabian Berressem, Friederike Schmid, and Arash Nikoubashman — Institute of Physics, Johannes Gutenberg University Mainz

The ability of copolymers to self-assemble into well-defined nanostructures has been of enormous importance in academic studies as well as in industry. This remarkable property makes it possible to create large volumes of materials with specific nanostructures and tailored properties. Previous research has focused mainly on diblock copolymers, as these macromolecules are relatively easy to produce. However, recent advances in chemical synthesis have made it possible to create more complex polymers such as multiblock copolymers. Self-assembled structures of multiblock copolymers contain many loops and bridges, which can drastically alter the rheological properties of the polymer melts compared to simple diblock copolymer systems. The microscopic arrangement of the individual polymers, and thus the distribution of loops and bridges, strongly depends on the specific polymer properties as well as the employed manufacturing processes, e.g., solvent casting or spray coating. Therefore, it is crucial to consider the self-assembly of the chains on a microscopic level to fully understand the macroscopic flow properties of the melts. To this end, we combine self-consistent field theory and molecular dynamic simulations of Lennard-Jones chains. Our simulations reveal that the number of loops and bridges increases with the number of blocks in a copolymer. Further we study how the order of the self-assembled structures is improved by applying external fields, such as substrate patterning or shear.