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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: Poster: New Instruments and Methods
CPP 11.9: Poster
Monday, March 22, 2010, 16:30–18:00, Poster C
Novel techniques for the exploration of three-dimensional molecular order — •Wilhelm Kossack1, Periklis Papadopoulos1, Friedrich Kremer1, Felicitas Brömmel2, Patrick Heinze2, and Heino Finkelmann2 — 1Universität Leipzig, Institut für experimentelle Physik I, Linnestr. 5, 04103 Leipzig — 2Albert Ludwigs Universität Freiburg, Institute for Macromolecular Chemistry, Stefan Meier-Str. 31, 79104 Freiburg
Liquid Crystal Elastomers (LCE) form a novel class of materials combining the properties of liquid crystals with elastomeric networks and which can cover several application areas due to their chemical diversity. IR-Transition Moment Orientational Analysis (IR-TMOA) is employed in order to determine mean orientation and molecular order parameter of the different molecular moieties (mesogen, polymer backbone, etc.). This technique takes advantage from the specifity of the IR spectral range. Based on the measurements of the transmission dependence of polarization and an intentionally adjusted inclination of the sample numerical analysis of Maxwells-equations enables one to determine seperately the spatial orientation function of each molecular group. This provides a detailled insight into the intramolecular interactions and thus into the mechanisms governing order.