six elastomers and 18 plastic materials common
to fuel storage and dispensing infrastructure and
vehicle fuel systems.
Elastomers included acrylonitrile butadiene
rubber (NBR), ;uorocarbon, neoprene, polyurethane, styrene butadiene rubber (SBR) and
Plastic materials included polyphenylene
sul;de (PPS), polyethylene terephthalate (PET),
polytetra;uoroethylene (PTFE), polyvinylidene
;uoride (PVDF), polyoxymethylene (POM), polybutylene terephthalate (PBT), polypropylene (PP),
high-density polyethylene (HDPE), polyetherim-ide (PEI), polyvinylchloride (PVC) and several
Many of these materials have been studied
rigorously with other fuel types, and their volume
change results corresponded well with their predicted solubility levels. Preliminary results indicate
that ketones and some esters and ethers might be
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Specimens of various types of materials are mounted on a sleeve that fits inside the
ethanol compatibility test chamber at ORNL. The test chamber allows these materials
to be exposed to a moving fluid at elevated temperatures for long periods of time.
The materials tested include metals and polymers used in fuel dispensers. The tests
are designed to assess the compatibility of these materials with intermediate ethanol
blends. Photo by Jason Richards.