Aggressiveness of a 20% bioethanol 80% gasoline mixture on autoparts: II Behavior of polymeric materials

► Polymeric materials exposed to E20 showed mass increases below 10%. ► Ethanol absorption by some polymers is due to the high affinity of the amide group with the hydroxyl group. ► Some polymers displayed a greater hardness decrease in samples immersed in gasoline than samples immersed in the E20. ► There were changes in the crystallinity of the PA66 after being exposed to both fuels.