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PO: Polymerphysik
PO 11: Poster: Flüssigkristalline Polymere
PO 11.1: Poster
Montag, 17. März 1997, 15:30–17:30, Gg
Electromechanical effects in ferroelectric liquid crystalline elastomers (FLCE) — •Walter Lehmann1, Lutz Hartmann1, Mario Keck1, Friedrich Kremer1, Peter Stein2, and Heino Finkelmann2 — 1Universität Leipzig, Fak. f. Physik u. Geowiss., Abt. P.A.F., Linnestra"se 5, 04103 Leipzig — 2A.-Ludwigs-Universität Freiburg, Inst. f. Makromolekulare Chemie, Sonnenstr. 5, 79104 Freiburg
A highly stable Michelson interferometer has been built and we can present a resolution of less than 100 fm in dynamical measurements. This setup has been used for the examination of the inverse electromechanical effects in ferroelectric liquid crystalline elastomers (FLCE). The temperature- and DC-dependence of the inverse effects (coupling to electric fields) and the direct effects (coupling to mechanical stress) are demonstrated. We can report inverse piezoelectric coefficients higher than those of classical piezoceramics like Bariumtitanate or PZT.