The compatibility of elastomer materials used in fuel dispensers was assessed for a gasoline standard containing 0, 10, 17, and 25 volume percent of aggressive ethanol. Specimens of fluorocarbon, fluorosilicone, acrylonitrile butadiene rubber (NBR), styrene butadiene rubber (SBR), silicone rubber, neoprene and polyurethane were immersed in test fuels flowing at a rate of 0.8m/s for 4 weeks at 60oC and then dried for 20h at 60oC. The change in volume, mass and hardness were measured for wet and dried conditions and dynamic mechanical analysis (DMA) was measured for the dry condition only.
Oak Ridge National Laboratory
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Funded from the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies Office.