High temperature accelerated aging was adopted to investigate property changes and life-span of sulfured nitrile-butadiene rubber(NBR) in glycol.Mass loss,mechanical property change,cross-section morphography of sulfured NBR aging in glycol at 70℃,90℃,110℃ were studied.According to Arrhenius equation,regard elongation as criterion,the relationship of velocity constant of aging and temperature was deduced.All results show that substance exchange exists between sulfured NBR and glycol,while sulfured NBR loses weight,sulfured NBR becomes brittle in glycol,holes and flaws also develop,life-span of sulfured NBR in glycol at a certain temperature could be deduced by high temperature accelerated aging.
Key words
NBR /
glycol /
aging /
life-span forecast
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