The Thermal Expansion Characteristics of Epoxy Resin/Crepe Paper Composites for High-Voltage DC Bushing

Nai Kui Gao; Chun Wu; Wen Xi Zhang; Zhou Xu; Hai Yun Jin

doi:10.4028/www.scientific.net/MSF.761.23

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HomeMaterials Science ForumMaterials Science Forum Vol. 761The Thermal Expansion Characteristics of Epoxy...

The Thermal Expansion Characteristics of Epoxy Resin/Crepe Paper Composites for High-Voltage DC Bushing

Abstract:

Abstract. In this paper, the thermal expansion characteristics of epoxy resin/crepe paper composite insulation structure for high-voltage DC bushing were studied. The results showed that when temperature was lower than the glass transition temperature(Tg) of epoxy resin, coefficients of thermal expansion along axial and radial direction of the insulation structure increased with increasing temperature; When higher than Tg, with an increasing temperature, the CTE along radial direction of the structure increased-even larger than the pure epoxy, while axial decreased. Tg is obtained by DSC. The microstructure of high-voltage DC bushing was observed by polarizing microscope. On the basis of the above analysis, the different trend in thermal expansion characteristics may be resulted from the sample structure, fiber distribution of crepe paper and the movement of epoxy resin molecular chains.

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Periodical:

Materials Science Forum (Volume 761)

Pages:

23-26

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.761.23

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Online since:

July 2013

Authors:

Nai Kui Gao, Chun Wu, Wen Xi Zhang, Zhou Xu, Hai Yun Jin

Keywords:

Composite Insulation Structure, Crepe Paper, DC Bushing, Epoxy Resin (ER), Thermal Expansion Characteristics

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