Fluorocarbon rubber (FKM) and hydrogenated Nitrile Butadiene
rubber (HNBR) are mainly used for packing and O-rings in car
engines. FKM materials have excellent heat, chemical, ozone, and
fuel resistance but have weak low-temperature resistance.
Therefore, it is doubtful if FKM and HNBR materials would
maintain their quality when a car was operated under ultra high or
low temperatures. We examined the reforming characteristics
based on the blending method to complement the individual
weaknesses of FKM and HNBR.