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Improved natural rubber composites reinforced with a complex ﬁller network of biobased nanoparticles and ionomer
- Jong, Lei
- Materials chemistry and physics 2018 v.203 pp. 156-165
- biopolymers, carboxylation, cohesion, hydrophilicity, mechanical stress, modulus of elasticity, nanoparticles, rubber, soot, tensile strength
- Biobased rubber composites are renewable and sustainable. Significant improvement in modulus of rubber composite reinforced with hydrophilic filler was achieved with the inclusion of ionomers. Soy particles aided with ionomer, carboxylated styrene-butadiene (CSB), formed a strong complex filler network in rubber. The effect of CSB caused Young's modulus and the tensile stress at 100-300% elongation to increase significantly while maintaining good tensile strength. The optimum concentration of CSB in natural rubber that produced the greatest improvement in tensile stress at higher elongation ratios and shear elastic modulus was determined. CSB improves the cohesion within the composites. The increase of reinforcement factor with increasing CSB and filler concentration in the composites indicates that the effect of CSB increased the reinforcement of soy nanoparticles more significantly at higher than lower filler concentrations. The mechanical properties of the composites were also compared to carbon black reinforced natural rubber composites. The result indicates great potential for tire tread applications.