Regensburg 2004 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 15: POSTER: Polymers and Biomaterials
CPP 15.41: Poster
Dienstag, 9. März 2004, 17:00–19:00, B
Influence of preparation conditions on the piezoelectric activity of ferroelectric polyamide 11 — •Alexander Kremmer1, Peter Fruebing1, Michael Wegener1, Werner Wirges1, Reimund Gerhard-Multhaupt1, and Harald Goering2 — 1Department of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam — 2Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin
The piezoelectric d33 coefficient of electrically poled commercial polyamide-11 films as well as of ferroelectric films, prepared by melting the powder in a hot press at 210∘C, quenching in ice-water, uniaxially stretching with a ratio of 3:1 and subsequent electrical poling above the coercive field (75 MV/m) is studied by use of dynamic piezoelectrical measurements where a force acts on the film periodically and the piezoelectric voltage across the film is measured. The influence of processing conditions (particularly stretching and annealing temperatures) on the piezoelectric activity and the temperature dependence of the piezoelectric coefficient is investigated in detail. The aim is the enhancement of the piezoelectric coefficient of the film material without losing its excellent thermal stability up to temperatures just below the melting region.