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Thermax N990 對三元乙丙橡膠電滲閾值的影響
作者:章羽
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摘要
彈性體如三元乙丙橡膠往往是電絕緣的,而炭黑填料的加入會導致電阻率的降低。通常,電阻率將隨著炭黑添加量的增加、顆粒尺寸的減小、結構的增大和分散度的減小而減小(電導率將增大)。其他因素也有影響,例如炭黑的表面化學性質。在熱炭黑的情況下,大顆粒尺寸和低結構會導致在給定添加下更大的聚集物間距離和更高的滲濾閾值。滲濾閾值是指填充物添加量,在該添加量下,膠料電阻率顯著降低,膠料從絕緣行為轉變為導電行為。
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