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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Interfaces and Thin Films

CPP 13.13: Poster

Dienstag, 27. März 2012, 18:15–20:45, Poster A

The interplay of structure and molecular dynamics in confinement of block copolymer meso-phases in thin layers — Markus Fuchs, •Martin Tress, Emmanuel Mapesa, and Friedrich Kremer — Universität Leipzig, Leipzig

Broadband Dielectric Spectroscopy (BDS) in combination with X-ray scattering is applied to investigate the molecular dynamics and the meso-phase morphology of the block copolymer system poly(isoprene-b-styrene) confined to thin layers. For the isoprene block, BDS enables one to study the segmental dynamics, taking place on a length scale of ∼0.5 nm, and chain dynamics, which cover length scales of tens of nanometers, separately at the same time. Different compositions of the block copolymer are selected according to their particular meso-phase structure and thin layers are deposited onto recently developed nano-structured electrode arrangements for the BDS measurements. By that, and the complementary structural investigations by X-ray scattering, the interplay of the meso-phase structure and the molecular dynamics on different length scales is examined.