*Synthesis Process Optimization of Polyimide Nanocomposite Multilayer Films, Their Dielectric… DOI: http://dx.doi.org/10.5772/intechopen.91206*

the applied voltage at which the electric breakdown occurred. The breakdown strength may vary by varying the temperature, moisture, and defects inside the material. The PI films that we synthesized have breakdown strength between 150 and 260 kV/mm [8, 10]. Due to its high electrical breakdown strength and mechanically tough properties, PI as an insulation can be useful to utilize in a high voltage industry applications, where electrical instruments can produce strong electrical field and leakage current to damage the insulation. Dielectric strength can vary due to the following reasons:

