This research aims to study the effect of addition carbon black material (type N-326) on the mechanical and physical properties of nitrile rubber (NBR) and the proportion of addition carbon black material is (0, 20, 40, 60, 80 pphr (part per hundred rubber)) to afixed percentage of nitrile rubber (100%) have been prepared with (factors of vulcanization, accelerators and activators using two-roll mill laboratory, molds, thermal piston and difference of examination conditions from pressure, temperature and time according to the ASTM), all tests were conducted in the laboratories of the College of materials Engineering - University of Babylon and laboratories of babylon tire company. Then carrying out the process of scheduling the results of laboratory testing and study its diagrams.
Where the results showed the mechanical properties of an increase in (the properties of tensile strength, hardness, modulus of elasticity, compression set, and tear resistance increase with the increasing percentages load until a certain levels of load bearing (60 pphr) and then decreases slightly, and a decrease in properties (elongation at break and resilience).
While the results of the physical properties show increase in viscosity, the greatest torque twisting, but scorch time and cure time decreases with the increasing the proportion of carbon black in the rubber recipe. specific gravity also increase with increasing carbon black material.