ABSTRACT
The changes in the movement and structure of atoms and molecules as a result of using nanocomposites are represented by the dielectric properties of the nanocomposites. In particular, the permittivity of nanocomposites can increase or decrease depending on the condition, and can be used as an index to evaluate the properties of nanocomposites. The phenomenon of decreasing the permittivity of the polymer by adding nanofillers is unique to nanocomposites. This chapter examines the effects of nanofiller interfaces on the polymer and of the volume percentage of nanofillers on the nanocomposites. The short-term breakdown characteristics of nanocomposite insulators are improved or deteriorated by various factors. The chapter introduces the electrical breakdown characteristics of nanocomposite insulators by focusing on the state of the nanofiller. Nanofillers act to suppress or decelerate tree propagation under the low electric field condition. It brings about enhancement of tree initiation voltage and prolongation of tree initiation time.
