Different molecular mechanisms for the dielectric hysteresis and pyroelectricity in a poly(vinyl alcohol) with azobenzene-alkoxy side chains

P. Fruebing; M. Wegener; Reimund Gerhard-Multhaupt; A. Buchsteiner; W. Neumann; Ludwig Brehmer

doi:10.1117/12.373707

14 December 1999 Different molecular mechanisms for the dielectric hysteresis and pyroelectricity in a poly(vinyl alcohol) with azobenzene-alkoxy side chains

P. Fruebing, M. Wegener, Reimund Gerhard-Multhaupt, A. Buchsteiner, W. Neumann, Ludwig Brehmer

Author Affiliations +

Proceedings Volume 4017, Polymers and Liquid Crystals; (1999) https://doi.org/10.1117/12.373707
Event: International Conference on Dielectric and Related Phenomena '98, 1998, Szczyrk, Poland

Abstract

By means of pyroelectrical measurements and dielectric spectroscopy as well as structural information from differential scanning calorimetry, it is shown that, in a poly(vinyl alcohol) with azobenzene-alkoxy side chains, pyroelectricity and dielectric hysteresis which are usually related to each other have different origins. The pyroelectric effect is explained with reversible dipole- density changes upon thermal expansion, whereas the dielectric hysteresis is proposed to result from a charge- carrier polarization.

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P. Fruebing, M. Wegener, Reimund Gerhard-Multhaupt, A. Buchsteiner, W. Neumann, and Ludwig Brehmer "Different molecular mechanisms for the dielectric hysteresis and pyroelectricity in a poly(vinyl alcohol) with azobenzene-alkoxy side chains", Proc. SPIE 4017, Polymers and Liquid Crystals, (14 December 1999); https://doi.org/10.1117/12.373707

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