Preparation and flashover properties of mica/CLPS composite

Cross-linked polystyrene (CLPS) was used as high voltage insulating material for its good electrical and mechanical properties. The flashover properties should be improved along with as the miniaturization of the impulse power system. The mica/CLPS composites were in-situ prepared with styrene、divinylbenzene (DVB), azodiisobutyronitrile (AIBN) and mica powder. The mica powder was dispersed in mix liquid of the precursors of CLPS. The components and morphology of the composites were tested by FT-IR and SEM, and the influence of mica powder on the flashover properties of CLPS was tested by high voltage impulse power. The result shows that the mica powder is well dispersed in the CLPS when its mass fraction is not more than 5%, while agglomerate happens with increase of the mica powder. The flashover voltage and resistance to discharge of CLPS are greatly improved with addition of 3.5%~5% mica.