Effect of gas expansion on charging behavior of quasi-piezoelectric cellular PP

Carlo Gian Montanari, Giovanni Mazzanti, Fabio Ciani, Mika Paajanen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

4 Citations (Scopus)


Cellular polymers, showing interesting quasi-piezoelectric properties upon charging under an electrical field, have been developed for a few years. They are manufactured by a method generating a high density of internal cavities, which play a major role in the charging process. Therefore, investigation of charging mechanisms is fundamental to reach optimization of electret and quasi-piezoelectric properties. This paper investigates the efficiency of contact charging of cellular polypropylene (PP) as a function of a manufacturing treatment, i.e. gas expansion, that increases the mean size of internal cavities. Testing techniques are based on partial discharge and space charge measurements. A model for the charging process is presented, with the purpose of providing explanations to the different behavior of cellular and cellular expanded PP.
Original languageEnglish
Title of host publicationThe 17th Annual Meeting of the IEEE Lasers and Electro-Optics Society
Subtitle of host publicationLEOS 2004
Place of PublicationPiscataway, NJ, USA
PublisherIEEE Institute of Electrical and Electronic Engineers
ISBN (Print)0-7803-8584-5
Publication statusPublished - 2004
MoE publication typeA4 Article in a conference publication

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