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