硫黄架橋ゴムの耐内部部分放電性

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書誌事項

タイトル別名
  • Internal Partial Discharge Resistance of Sulfur Cured Rubber
  • イオウ カキョウ ゴム ノ タイ ナイブ ブブン ホウデンセイ

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説明

Because of the strong activity of atomic oxygen produced by partial discharges, it is very difficult for organic insulating materials to withstand it. Then in order to prevent the insulation deterioration due to partial discharges, it is a practical mean for long time to minimize the partial discharges in insulation or to use inorganic materials combined with organic materials. The authors discovered about 30 years ago that rubber shows excellent PD resistance in some condition, and this paper describes that every sulfur cured rubber shows excellent PD resistance, whereas pure rubber and peroxide cured rubber does not. Through the PD resistance test for thermo-plastic rubber with each element of sulfur curing agents, it has been clarified that the most important combination of elements is that of sulfur, ZnO and double bond of polymer. And in this case, it seems probable that some chemical bonds of sulfur with rubber are produced since there is no bloom of sulfur on cured samples.<br>An inorganic film is formed on the surface of samples after internal partial discharges, and it may perform partly as the protective film for deterioration due to discharges, but the main cause must exist in the action of the newly produced some sulfur bond, and it is the most important subject of future research to clarify this mechanism.

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