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This work describes the preparation of kewda fiber and carbon black reinforced natural rubber composites by the milling process. The alkali-treated fiber is incorporated in the rubber matrix as 0, 1, 3, and 5 per hundred rubber with varying amounts of carbon black 0, 10, and 15 phr. Response surface methodology was used to examine the optimum tensile (20.83 MPa) and tear strength (56.00 N mm −1 ) along with elongation at break (2,546 %) at the corresponding composition of 1.50 phr of fiber and 8.94 phr of carbon black, which are higher than that of the neat sample, 12.71 MPa and 24.56 N mm −1 . Tensile strength was diminished from 20.83 MPa to 13.19 MPa as the fiber amount was increased beyond 1 phr up to 5 phr. Likewise, the addition of carbon black beyond 10 per hundred rubber causes a decrease in mechanical properties. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to study the morphology and inter-component interactions of composites. The thermal stability of the composites was improved from 320 °C to 335 °C and the maximum weight loss occurs at a higher temperature with the addition of carbon black. Thus, the reinforcement of fiber and carbon black in the rubber matrix improved the mechanical and thermal properties of the final material.

international journal of materials research

High performance of synergistic reinforced natural rubber with kewda fiber ( Pandanus odoratissimus ) and carbon black: thermal, morphological and statistically optimized mechanical studies