Abstract
Abstract. The thermal aging experiments on nitrile rubber and rubber additives were carried out for different time in 25# transformer oil at 70°C. The amount of CH4 released from non-rubber group, nitrile rubber group and rubber additives group were measured by Gas Chromatography (GC). The molecular structure of NBR matrix and liquid extracted from NBR were analyzed with fourier transform infrared analysis (FTIR), respectively. At last, the formation mechanism of CH4 in nitrile rubber were investigated. The results illustrated that the rubber additive RD released methyl radicals and hydrogen radicals, and generated CH4 by reacted with each other.
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