In this work, the compatibilization effect of trans-polyoctylene rubber (TOR) on the cure characteristics, tensile properties and morphology of epoxidized natural rubber / sawdust flour (ENR-25/SD) compounds was evaluated. Five different TOR content (2, 4, 6, 8 and 10 phr) was used. Results showed that the increasing of TOR content caused decreasing on scorch and cure time. Moreover, the maximum torque has improved. The minimum torque showed decreasing as TOR content increased indicating that the rubber compound became less viscos and easy to process. The addition of TOR, particularly high TOR content (10 phr) into rubber compounds has increased the interfacial adhesion between SD and ENR-25, which in turn improved the tensile strength and modulus of the rubber compounds. The elongation at break has decreased as TOR content increased indicating that the samples became less flexible. SEM micrographs proved that the high TOR content presented stronger SD/ENR-25 than low TOR content.
