Influence of Ethylene Ionomers on the Electrical Properties of Crosslinked Polyethylene

✍ Scribed by Qing Quan Ke; Xing Yi Huang; Ping Wei; Gen Lin Wang; Ping Kai Jiang

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 180 KB
• Volume: 291
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200600206

✦ Synopsis

Abstract

Summary: Water treeing is a deterioration mechanism observed in the polymeric insulation of extruded cables, which can affect the service life of the transmission and distribution XLPE power cables. To improve the water‐tree resistance of XLPE, it was blended with sodium‐neutralized EAA‐Na ionomers which were formed by neutralization of EAA with NaOH. A series of XLPE/EAA‐Na ionomer blends were investigated for their electrical properties, such as water treeing, electrical breakdown strength, dielectric constant, and dissipation factor. The results strongly suggest that EAA‐Na ionomers can improve the water‐tree resistance of XLPE, and the XLPE/EAA‐Na blends retain excellent dielectric properties. Characterization of XLPE/EAA‐Na blends by using FTIR indicates that the neutralization reaction is effectively achieved. In addition, it can be found that XLPE/EAA‐Na blends are partially compatible from observing morphology observations made by SEM and, therefore, EAA‐Na ionomers can be well dispersed in the matrix.

Water tree length of the XLPE/EAA‐0.5Na blends.

magnified imageWater tree length of the XLPE/EAA‐0.5Na blends.