Abstract :
The effect of the molecular size of the black carbon (N326, N375, N660) on the damping properties such as
(Rebound Resilience, damping time) and Mechanical properties (hardness, specific gravity) had been studied in this
research. Synthetic rubber BRcis known as Bona given extensive applications, especially in the tire making because
of its high resistance to friction. The research includes the preparation of 13 batches where the synthetic rubber BRcis
in each batches was (pphr 100). The ratios of black carbon (N326, N375, N660) follows are (0, 10, 20, 30, 40) pphr
for each type of black carbon. All the mechanical tests and damping properties measured according ASTM such as
hardness by Shore A according to standard ASTM D2240 as well as the specific gravity was measured by a device
Densitron instrument, in addition to the properties of damping such regressive or reactionary as well as the damping
time was measured by Tripsometer equipment according to standard ASTM D1054. The results revealed that the
values of hardness and specific gravity for carbon black (N326) composites are larger than the values of these
properties of N375 and N660 composites, so the inverse relation for rebound resilience and damping time property.
Keyword :
Rebound Resilience, Damping properties, Butadiene Composites