Cure Characteristics and Physico-Mechanical Properties of Natural Rubber Filled with the Seed Shells of Cherry ( Chrysophyllum Albidum )|
Osabohien, E. & Egboh, S.H.O.
The cure characteristics and the physico-mechanical properties of natural rubber, standard
Nigerian rubber, SNR10 filled with cherry seed shell (CSS) and standard carbon black CB (N330) were
determined. The results showed that the scorch, cure times and the maximum torque gradually increased with
increasing filler content for CSS-filled natural rubber, but in the case of CB-filled natural rubber, the scorch and
the cure times decreased while the maximum torque increased with increasing filler content. The tensile strength of
both CSS and CB-filled vulcanizates increased to a maximum at 40 phr filler content before declining. The moduli
(M100 and M300), specific gravity (S.G), hardness and abrasion resistance increased while the elongation at break
and Dunlop resilience decreased with increasing filler content for both vulcanizates. The locally sourced CSS
filler, had a lower reinforcement properties compared to the CB (N330) filler, probably due to its higher moisture
content and larger particle size.