Authors : Siti Nur Liyana Mamauod, Basirah Fauzi, Siti Noor Fazira Roslan and Roslinda Fauzi
Abstract: In this research, the Mooney viscosity, crosslink density and cure characteristics of the treated Silane–Carbon Black/Nanocalcium Carbonate (Si–CB/NCC) reinforced Natural Rubber/Styrene Butadiene Rubber (NR/SBR) composites were investigated. The results showed that the addition of treated CB/PCC at different concentration of silane coupling agent increases the crosslink density where the superior crosslink density of composites was achieved at 4 wt.% of silane treatment (NR–SBR/CB–NCC4–Si69). At this composition an increment of crosslink density is about 11% as compared to the untreated filler–BR/SBR composites. A positive correlation between crosslink density and Mooney viscosity behaviours has been shown that by increasing the 3D–network structure, it increases the viscosity and compactness of the rubber composites structures. The formation of optimum active sites on the CB and PCC filler surfaces led to accelerate the vulcanisation process about 17% as compared to untreated filler–NR/SBR composites where these active sites of fillers surface led to an increase of the adhesion at the interface between treated fillers and NR/SBR matrix. It is noted that sufficient amount of silane is required to improve the overall properties because excessive silane content gave the plasticising effect to the composites structure, thus, resulting in the reduction of other properties.
Siti Nur Liyana Mamauod, Basirah Fauzi, Siti Noor Fazira Roslan and Roslinda Fauzi, 2019. Hybridized Reinforcement of Natural Rubber/Styrene ButadieneRubber (NR/SBR) Blend with Treated Bis (3–Triethoxysilylpropyl) Tetrasulfide(Si 69)–Hybrid Carbon Black/Nanocalcium Carbonate Filler: Mooney Viscosity, Crosslink Density and Cure Characteristic. Journal of Engineering and Applied Sciences, 14: 6208-6212.