Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: POSTERS Polymerphysics
CPP 34.26: Poster
Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A
Thermo-optical and thermo-mechanical properties of smectic liquid-crystal — •Jörg Petzold1, Tilo Finger1, Ralf Stannarius1, Patrick Beyer2, and Rudolf Zentel2 — 1Otto-von-Guericke Universität Magdeburg — 2Johannes Gutenberg-Universität Mainz
Incorporation of liquid-crystal mesogens in polymer backbones and subsequent cross-linking leads to the preparation of main chain liquid crystalline elastomers (LCE). Such compounds show unique effects because of the interaction of mesogenic and elastomer properties.
We report mechanical, x-ray and optical measurements of freely suspended filaments of such LCE. Among the interesting effects are the reversible elongation of the filaments along the smectic-isotrop phase transition (thermoelasticity) and a strain induced birefringence due to the coupling of mesogen orientation and applied stress. Elastic and optical parameters are derived from the stress-strain characteristics.
For additional information: "Monodomain Liquid Crystal Main Chain Elastomers by Photocrosslinking" by Patrick Beyer, Eugene M. Terentjev, Rudolf Zentel