The Effect of Natural Based Oil as Plasticizer towards Physics-Mechanical Properties of NR-SBR Blending for Solid Tyres

Petroleum derivatives oil has been used dominantly as a primary plasticizer in rubber compounding for tyre industries. Despite its harmful effect to the environment, it is also a nonrenewable resources that need to be replaced. This research would study the effect of natural based oil such as castor oil, palm oil, fried - palm oil as an alternative plasticizers to replace petroleum based oil like white oil and minarex oil in Natural Rubber and Styrene Butadiene Rubber (NR-SBR) composites for rubber solid tire. The rubber compounding applied the same amount of each plasticizers which was 8,75 phr in 90/10 phr of NR-SBR composites filled by 64 phr Carbon Black N330 and 34 phr CaCO₃. Physical mechanical properties of 5 formulas were examined, the hardness values range from 68 - 74 ShoreA; tensile strength 118 - 136 kg/cm²; modulus 200% 19,25 – 31,16; density 1,22 - 1,29 g/cm³, abrasion resistance 102,37 - 135,64 mm³, compression set (tested in 25% defl, 70 °C, 22 hours) range from 65,44 to 72,35; and there were no crack for ozone resistance (tested in 50 pphm, 20% strain, 24 hours, 40 °C). To sum up, it is indicated that there is no significant difference in physical mechanical properties of composites using either natural or petroleum based oil as plasticizers.