Synthetic plastic insulation

All synthetic organic plastics, it seems pretty safe to say, are to a greater or less degree electrical insulating materials or dielectrics, except when they have been deliberately modified by addition of conductive fillers. For the purposes of this review, therefore, the literature on plastics, even when not dealing specifically with electrical properties and electrical applications, is considered to be an important part of the literature on dielectrics in general, and as such to be of interest and concern to the electrical engineer and to the research worker in the field of dielectrics.