Space charge distribution in low-density polyethylene (LDPE)/pumice composite

  • Bai Han
  • , Zhi Sun
  • , Yang Chen
  • , Fuqiang Tian
  • , Xuan Wang
  • , Qingquan Lei

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

4 Scopus citations

Abstract

Low-density Polyethylene (LDPE)/Pumice composites with different pumice weight percentage (1 wt%, 2 wt% and 5 wt%) were prepared by melt blending process in torque rheometer. Space charge distribution in composites and pure LDPE were investigated with pulsed electro-acoustic method (PEA). The results indicate that most of the space charge in pure LDPE under high electrical field was homo-polarity space charge which was gathered near both sides of the two electrodes. Oppositely, the space charge distribution in LDPE/pumice composite makes large differences. There was a great amount of hetero-polarity space charges appeared near cathode in LDPE/pumice composites, and the quantity of hetero-polarity space charge increased along with the increasing of pumice content. A great amount of positive charge was injected in LDPE/Pumice composite with pumice 5 wt% near the anode side, and these positive charges moved toward to the cathode of the sample when the electrical field strength increased to 30kV/mm and 50KV/mm. As the circuit was shorted, the decay of space charge vs. time is measured for all the samples. It shows that the space charge in pure LDPE and LDPE/Pumice composite with pumice 1 wt% decayed rapidly, nevertheless the space charge in LDPE/Pumice composite with pumice 2 wt% and 5 wt% decayed more slowly. There was quiet a few of space charges in pumice 5 wt% composite after short-circuited over 60 min.

Original languageEnglish
Title of host publication2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
Pages969-972
Number of pages4
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009 - Harbin, China
Duration: 19 Jul 200923 Jul 2009

Publication series

NameProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials

Conference

Conference2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2009
Country/TerritoryChina
CityHarbin
Period19/07/0923/07/09

Keywords

  • Ldpe
  • Pea
  • Space charge

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