Space charge behaviour in maleic anhydride grafted polyethylene/ethylene-vinyl-acetate copolymer laminates

Abstract

Charge distributions in maleic anhydride (MAH) grafted polyethylene (g-PE)/ethylene-vinyl-acetate (EVA) copolymer laminates have been measured with materials of different composition. All laminates showed interfacial charge, the polarity and the magnitude of which are explained by interfacial polarization. It was found that the interfacial charge increased with the increase of MAH content in the g-PE, whereas it decreased with the increase of vinyl-acetate content in the EVA. This feature was attributed to the differences in electrical conductivity of the materials. Details of the experimental results are described.