Charge distribution in polyethylene/ethylene vinylacetate laminates and blends

Kwang S. Suh, Jae Young Kim, Chang Ryong Lee, Tatsuo Takada

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The formation of space charge in polyethylene/ethylene vinylacetate copolymer (PE/EVA) laminates was investigated using a pulsed electroacoustic (PEA) method. The formation of heterocharge was observed in PE while positive charge (holes) was distributed over the EVA specimen. In the laminates, however, a large amount of charge accumulates at the interface between PE and EVA, resulting in an increase of the electric field in the PE layer. When the thickness of the EVA layer is smaller than that of the PE layer, negative charge dominates in the PE layer due to enhanced charge injection caused by the increased electric field in the PE layers. When these polymers are blended, the amount of heterocharge in the PE/EVA blends varies inversely with the vinylacetate content by the enhancement of homocharge trapping at PE/EVA interfaces and/or by the enhancement of charge injection via an increased electric field in the PE component.

Original languageEnglish
Pages (from-to)201-206
Number of pages6
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume3
Issue number2
DOIs
Publication statusPublished - 1996

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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