Authors : Siti Nur Liyana Mamauod, Nor Atiqah Suhaimi, Rossuriati Dol Hamid, Amirah Amalina Ahmad Tarmizi and Siti Salina Sarkawi
Abstract: Surface treament of Carbon Black (CB) and Precipitated Calcium Carbonate (PCC) was successfully prepared and used as a reinforcement in Natural Rubber and Styrene Butadiene Rubber (NR/SBR) blends. The effect of different concentration of tetra bis (3-(triethoxysilyl) propyl) tetrasulfide silane coupling agent (Si-69) ranging from 2-10 wt.% on the CB/PCC surface was studied by calculating the crosslink density formed between rubber and filler phases using Flory-Rehner equation. The data for Flory Rehner equation was obtained by swelling measurement. And also, the physical and mechanical of Si-69 treated CB/PCC reinforced NR/SBR blends was investigated. The amount of CB and PCC was set to be fixed. It was shown from the experimental results that 6% of Si-69 solution was the optimum concentration which exhibited the highest crosslink density developed between filler and rubber matrix phases as compared to the other treated and untreated samples. Up to 6% of Si-69 concentration gave the plasticizing effect on the filler surface resulting in reduction of physical and mechanical properties of NR/SBR blends. Apart from that the obtained results indicated that treated CB/PCC filler at 6 wt.% Si-69 concentration exhibited better overall physical and mechanical properties due to good filler-rubbermatrix interfacial bonding.
Siti Nur Liyana Mamauod, Nor Atiqah Suhaimi, Rossuriati Dol Hamid, Amirah Amalina Ahmad Tarmizi and Siti Salina Sarkawi, 2019. Influence of Si-69 Treated Hybrid Carbon Black/Precipitated Calcium Carbonate Filler on the Crosslink Density and Physico-Mechanical Properties of NR/SBR Blends. Journal of Engineering and Applied Sciences, 14: 7771-7777.