Multi walled carbon nanotube filled SBR rubber composites

Carbon nanotubes (CNTs) have excellent mechanical properties which make them prime candidates for application in high performance composite materials. Modified multi-walled carbon nanotubes (MWNTs) were achieved by refluxing the tubes in a HNO_3 (67?%) solution, blending them with SBR rubber and compatibilizers, and then processing in an open-mixer. The effects of different content of MWNTs on the performance and micro-structure of the SBR composites were investigated and compared with that of carbon black (N330) filled composites. Results show that the tensile strength of MWNT/SBR composites increases with increasing the MWNT content. The Shore hardness (58), tear strength (25.9?kN/m), and abrasion (0.22?mL/1.61?km) of the MWNT/SBR composite are better than those of carbon black (N330)/SBR composites, which points to promising applications for tires with low rolling hysteresis and decreased fatigue loss.