DGEBA(diglycidyl ether of bisphenol A)-MDA(4,4`-methylene dianiline)에서 SN(succinonitrile) 첨가에 따른 침전극 계면에서의 전기적 현상을 고찰하였다. 국부적 고전계하에 발생한 고온으로 변색된 영역은 트리(tree)개시의 선결조건이며, 이 지역에서는 미반응된 작용기가 재배열되고 경화반응이 더 진척되었다. 또한 반응성 첨가제 SN의 함량이 증가함에 따라 절연파괴전압은 감소하다가 25㎸로 포화되었으며, 관찰된 트리는 dendrite상이었다.

The electrical phenomena at the interface of cured DGEBA(diglycidyl ether of bisphenol A)-MDA(4,4`-methylene dianiline)-SN(succinonitrile) system and needle electrode were investigated. At the discolored region around the needle, which should be formed before the tree initiation, unreacted functional group was rearranged and curing reaction was proceeded under the regional high electric field. As SN contents were increased, the dielectric breakdown voltage was decreased and saturated at 25㎸. The shape of the tree in this system was a dendrite type.