Effect of compound technology on polyethylene/ montmorillonite composites

The dielectric properties of nanometric dielectrics have attracted much attention since John Lewis published the article; the title is ldquoNanometric Dielectricsrdquo, on IEEE transactions on dielectric and electrical insulation in 1994. However, the majority of works reported in the literature were involved in comparing the dielectric properties of polymer/inorganic nano-particles composites those of with polymer/inorganic micro-particles composites, and investigation on dielectric properties of polymer layered silicate (PLS) nano-composites, which exhibit excellent thermal and mechanical properties, were rarely found to be reported. The paper investigates the effect of dielectric property of nano-montmorillonite transnature polyethylene (PE), the polyethylene/montmorillonite (PE/MMT) nano-composites are prepared by melting intercalation process. The dielectric properties of the nano-composites are investigated, and then the space charge profile in PE/MMT and PE is measured by pulsed electro-acoustic (PEA) method respectively. The test results indicate that the involvement of nano-MMT can decrease the amount of space charge in dielectric The AC breakdown strength can be enhanced.