Interfacial properties of XLPE/EPDM laminates

Interfacial properties such as space charge accumulation and breakdown characteristics in crosslinked polyethylene (XLPE)/ethylene propylene diene terpolymer (EPDM) laminates were investigated. Homocharge is observed in EPDM containing 1,4-hexadiene while heterocharge is observed in EPDM containing...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2000-04, Vol.7 (2), p.216-221
Main Authors: Suh, K.S., Jin Ho Nam, Ji Hwan Kim, Kwang Cheol Ko, Sang Ok Han
Format: Article
Language:English
Subjects:
Additives
Breakdown
Cable insulation
Charge
Chemicals
Computer interfaces
Curing
Direct current
Electric breakdown
Electric potential
Greases
Heat treatment
Laminates
Petroleum
Silicones
Space charge
Voltage
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Summary:Interfacial properties such as space charge accumulation and breakdown characteristics in crosslinked polyethylene (XLPE)/ethylene propylene diene terpolymer (EPDM) laminates were investigated. Homocharge is observed in EPDM containing 1,4-hexadiene while heterocharge is observed in EPDM containing 5-ethylene-2-norbornene. Interfacial charge develops when the EPDM is laminated with XLPE. The polarity of this interfacial charge reverses at less than a few tens of hours heat treatment at 80/spl deg/C dc breakdown voltage shows a sequential change of an increase, a decrease and a slight increase as a function of heat treatment time, which holds true for both interfacial and volume breakdown voltages. A maximum breakdown voltage is observed at 20 to 24 h heat treatment. After long heat treatment, silicone grease used in the interface shows lower interfacial breakdown voltage than silicone oil for the dc case, which was attributed to the additives in the grease and the molecular weight of silicone molecules in oil and grease. Details of the results are given and their origins discussed.
ISSN:1070-9878
1558-4135
DOI:10.1109/94.841812