Surface area is probably the most important morphological characterization for reinforcing
the matrix of composite polymer, therefore we used different grades of carbon Black fillers
containing different surface area and structure for improving the cure characteristics and
Mechanical properties of composite natural rubber. The grades of carbon black should be added at the
same loading levels with different average nitrogen Surface areas m2/g and structures for grades
(34m2
/g for N660, 76 m2/g N330, 77 m2/g for N326, 91 m2
/g for N375). We note to increase the max.
torque(Ib-in) for an Oscillating disk of Rheometer and Mooney viscosity Ml(1+4) at 100C° Also
increase in reversion time Because the cure curve it is reversion type with increase the surface area
of particles carbon black.
And slowly decrease for the scorch time (min) and increase the cure time with the surface
area of particles carbon black, Either about the mechanical properties, we note an increase in Mod300%
(Mpa), Compression (C.S %), Tensile strength (Mpa), Hardness shore A and Elongation at the break
(%) with an increase in surface area. These results are goodness Indications for role surface area of
particles carbon black to enhanced cure characteristics and mechanical properties of the composite
natural rubber.