Nitrile rubber is characterized by having excellent
oil resistance. On the other hand, NBR has
poor ozone and weather resistance. This latter disadvantage
has been overcome by blending NBR
with EPDM rubber, which is known to posses’ good
resistance to ozone and oxidation attack due to its
practically total saturation character. Accordingly,
it has been found appropriate to follow the swelling
behavior of prepared blend as well as its composites
in two oils, namely, car oil and brake oil.