Abstract
The objective of the study was to investigate the effect of the partial replacement of carbon black (CB) by nanodiamonds (NDs) on the vulcanization, mechanical and dynamic properties of a natural rubber—butadiene rubber compound, a typical elastomer compound found in several applications (the tire and mining industry, for example). A studied hybrid filler system resulted in a 28% increase in tensile strength and 29% increase in 300% modulus at low ND loadings even though the total weight fraction of the filler system was kept constant at 25 parts per hundred rubber. The hybrid filler system improved dispersion of both fillers as was proven by scanning electron microscopy and the Payne effect study. In addition, the replacement of 2.5 and 5 phr CB by NDs resulted in 62% improvement in wear resistance. The DMA study showed that a certain ND-CB filler combination has a positive effect on tire properties such as wet grip and rolling resistance.
Highlights
A rubber compound consists of several components
A high reinforcing ability of Carbon black (CB) is related to small particles and aggregate size and high structure of the filler resulting in a large surface area available to interact with polymer chains and create chemical and physical bonding with rubber [1]
The effect onon thethe properties of of a natural rubber—butadiene rubber compound studied by gradual replacement a natural rubber—butadiene rubber compound waswas studied by gradual replacement of a of a small amount of carbon black nanodiamonds.Significant
Summary
A rubber compound consists of several components. One of the most important additives are fillers that are added for several purposes, such as to enhance the mechanical properties of rubber, reduce costs or improve a specific property, e.g., electrical conductivity.Carbon black (CB) has been the main reinforcing filler in rubbers over a century. A rubber compound consists of several components. One of the most important additives are fillers that are added for several purposes, such as to enhance the mechanical properties of rubber, reduce costs or improve a specific property, e.g., electrical conductivity. Carbon black (CB) has been the main reinforcing filler in rubbers over a century. A high reinforcing ability of CB is related to small particles and aggregate size and high structure (shape and level of branching of aggregates) of the filler resulting in a large surface area available to interact with polymer chains and create chemical and physical bonding with rubber [1]. This, together with a high carbon footprint of the CB manufacturing process, increases the requirement for new filler solutions [2] CB has a negative influence on dynamic properties compared to silica, the second traditional reinforcing filler, which is currently used, for example, in tire treads.
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