Effect of reverse polarity on space charge evolution in polypropylene with different concentration of natural and synthetic nano clay

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Proceedings title2013 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena
Conference2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2013), October 20-23, 2013, Chenzhen, China
Pages# of pages: 5
AbstractThe space charge evolution in the Polypropylene (PP) loaded with two types of nanoparticles, synthetic and natural clay with weekly reversing polarity was studied. The sapce charge in these two polymer nanocomposites (PNCs) were measured with the PEA technique after he each period of poling. The charge distribution in the host materials was substantially smaller after reverse polarity compared to dc negative polarity. This could be related to the mitigation of charge bay the compatibilizers added to the host materials. The charge accumulation measured after the negative periods were lower than the positive periods. The PNC with 2-wt& of synthtic clay stocks lots of charges after the end of the positive periods. Then, it will not be optimal concentration as it was for dc poling. It is found out that the two optimal concentrations for reverse polarity were 4-wt% (PPI-S4%) for the synthetic PNC and the 2-wt% (PPI-N2%) for the natural PNC. With reverse polarity and before the 12th week of poling all filled and unfilled materials stock charges of the same order. The unfilled materials show increasing of charges that crosses the values of filled materials, except the PPA-S3%, after the 12 weeks of poling with reverse polarity. More poling time is necessary to investigate the effect of long term poling on the charge evolution and investigate the continuous increase of charge in the unfilled materials.
Publication date
PublisherIEEE Dielectrics and Electrical Insulation Society
AffiliationNational Research Council Canada; Measurement Science and Standards
Peer reviewedYes
NPARC number21270497
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Record identifier58e04c6a-f4bf-4474-b358-aedd2fbc3172
Record created2014-02-14
Record modified2016-05-09
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