Effect of compound technology on polyethylene/ montmorillonite composites

Gao, Junguo; Guo, Ning; Liu, Yali; Li, Jing; Hu, Haitao; Sun, Liang; Zhang, Xiaohong

doi:10.1109/icpadm.2009.5252157

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Several authors have reported that interface region plays an essential role in improving the insulating performance of nanodielectric materials [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Structure and Dielectric Breakdown in LDPE/HDPE/Clay Nanocomposites

2014

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Cross-linked polyethylene (XLPE) is commonly used in medium/high voltage insulation due to its excellent dielectric properties and acceptable thermomechanical properties. To improve both electrical and thermal properties to a point that would possibly avoid the need for crosslinking, nanoclay fillers can be added to polymer matrix to form nanocomposites materials. In this paper, PE/clay nanocomposites were processed by mixing a commercially available premixed polyethylene/O-MMT masterbatch into a polyethylene blend matrix containing 80 wt% low density polyethylene LDPE and 20 wt% high density polyethylene HDPE with and without compatibilizer using a corotating twin-screw extruder. Various characterization techniques were employed in this paper, including optical microscopy, AFM, TEM, TGA, DMTA, and dielectric breakdown measurements in order to understand the correlation between structure and short-term dielectric breakdown strength.

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“…Several authors have reported that interface region plays an essential role in improving the insulating performance of nanodielectric materials [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Structure and Dielectric Breakdown in LDPE/HDPE/Clay Nanocomposites

2014

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Study on space charge behaviour in polyethylene doped with nano-montmorillonite

Gao

Zhou

Sun

et al. 2013

2013 IEEE International Conference on Solid Dielectrics (ICSD)

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Space charge existed in polymer subjected DC high electrical stress has attracted more and more attention over the world. Various methods of inhibiting space charge generation and accumulation had been attempted in order to reduce insulation deterioration. In the present paper, the polyethylene/montmorillonite nanocomposites are prepared by melting intercalation process. The distribution of space charges in the nano-composite is investigated by means of pulse electric acoustic (PEA) method under different conditions. The effects of maleic anhydride grafted polyethylene (PEMA) on space charge characteristics of the composites are discussed. The test results indicate that the heterogeneous space charges in the nanocomposite near the cathode gradually decrease with PEMA content increasing. When PEMA content is 20%, the heterogeneous space charges near the cathode almost disappear at all in the nanocomposite. In short-circuiting process, the residual space charges in the nanocomposite with compatilizer obviously decrease comparing with origin LDPE. It is suggested that PEMA as a compatilizer can improve the interaction combination between LDPE and O-MMT, consequently interfacial traps reduce.

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