Comparative study of AC breakdown voltage for PMMA:TiO2 nanocomposite thin film influence of electrode shape and hydrothermal ageing / Melvin Welan Mathew

This research is a comparative study of AC breakdown voltage of poly(methyl methacrylate):titanium dioxide (PMMA:TiO2) nanocomposites thin films to be used as insulation in high voltage applications. The objectives of this research is to study the AC breakdown voltage of PMMA:TiO2 nanocomposites thin films by varying the hydrothermal ageing (annealing) temperature from 60°C, 90°C, 120°C, 150°C and 180°C. Moreover, different type of electrodes shape was used to observed the insulation properties of PMMA:TiO2 thin films. Spin coating technique was used to make the PMMA:TiO2 nanocomposites thin film The electrical properties was measured using high voltage test while the structural properties was measured using structural profiler and atomic force microscopy (AFM). As a result, the thickness and the surface roughness of the thin film are affected by the annealing temperature. Thus, the electrical performance of PMMA:TiO2 nanocomposites thin film as an insulation in high voltage also affected For the shape of electrodes, the surface area of an electrode will affect the conducted surface area between PMMA:TiO2 nanocomposites thin film and the electrode.