Abstract

Present work illustrated that the performance of ultrafine silica (Si) particles was improved considerably by rational hybridization with nanodiamond (ND). For this, [email protected] hybrid particles synthesized by chemical hybridization were incorporated into styrene-butadiene rubber (SBR) up to 10 phr. Scanning electron microscopy revealed coarse flower-like clusters for [email protected] nanohybrids, while Si exhibited rigid agglomerates in SBR. Comparing with physical hybrid (Si&ND) and single Si particles, it was revealed that chemical hybrids synergistically improved tensile properties, like 100% and 135% improvements in tensile strength and elongation at break, respectively. Dynamic mechanical analysis of SBR/[email protected] revealed an increment of the wet skid (22%) compared with SBR and further reduction of rolling resistance, to ∼35%, with respect to SBR/Si due to better dispersion and improved polymer-filler interactions. Thermal conductivity of SBR increased considerably, i.e., ∼54%, by the inclusion of [email protected]%ND, which was explained based on the promotion of phonon pathways.

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