ULTRA-HIGH ACN POLYMER IN FUEL SYSTEM APPLICATION

New automotive trends for multiple fuel usage and low permeability are requiring new technical advancements as the traditional nitrile polymers fail to meet engineering demands.

Data for nitrile polymers with acrylonitrile content in the 35% to 50% range have been developed with various fuels for various testing times. The improvement in fuel impermeability and fuel resistance at a very high acrylonitrile content is demonstrated.

The ultra-high acrylonitrile polymer has been compared with hydrogenated nitrile. The thermal stability and the response to fuels and permeability of these two systems were investigated to establish the most economical engineering solution to meet automotive demands.