Interfacial charge in polyethylene/ethylene vinylacetate laminates

Space charge formation in polyethylene (PE)/ethylene vinylacetate copolymer (EVA) laminates has been investigated using a pulsed electroacoustic method. The PE shows heterocharge while the EVA shows a broad distribution of positive charge over the sample. The positive charge in EVA decreases with th...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 1996-12, Vol.3 (6), p.758-764
Main Authors: Suh, K.S., Kim, J.Y., Noh, H.S., Lee, C.R.
Format: Article
Language:English
Subjects:
Applied sciences
Chemicals
Coatings
Distortion measurement
Exact sciences and technology
Forms of application and semi-finished materials
Heat treatment
Laminates
Petroleum
Polyethylene
Polymer industry, paints, wood
Pulsed electroacoustic methods
Resistance heating
Space charge
Technology of polymers
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Summary:Space charge formation in polyethylene (PE)/ethylene vinylacetate copolymer (EVA) laminates has been investigated using a pulsed electroacoustic method. The PE shows heterocharge while the EVA shows a broad distribution of positive charge over the sample. The positive charge in EVA decreases with the increase of vinylacetate (VA) content in EVA. Interfacial charge is found in all laminates and remains unchanged by heat treatment at 100/spl deg/C to 1 h and by coating chemicals such as silicone oil and trimethylolpropane trimethacrylate at the interfaces, This interfacial charge distorts the electric field distribution in the direction of increasing the electric field in the PE layers. The charge distribution in PE/EVA blends has been measured and is explained via the results obtained with the laminates.
ISSN:1070-9878
1558-4135
DOI:10.1109/94.556556