TITLE

Ultraviolet-induced discharge currents and reduction of the piezoelectric coefficient in cellular polypropylene films

AUTHOR(S)
Mellinger, Axel; Camacho González, Francisco; Gerhard-Multhaupt, Reimund
PUB. DATE
January 2003
SOURCE
Applied Physics Letters;1/13/2003, Vol. 82 Issue 2, p254
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Photostimulated discharge spectroscopy of cellular polypropylene films between 200 and 400 nm showed the existence of at least three distinct trapping levels at 4.6, 5.6, and 6.3 eV. The effects of UV irradiation on the piezoelectric d[sub 33] coefficient was studied by monitoring thickness-extension resonances in the dielectric spectrum. Prolonged irradiation at wavelengths below 210 nm led to a reduction of the piezoelectric coefficient, caused by partial discharge of the polymer foam.
ACCESSION #
8858607

 

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