Mechanical Properties of Natural Rubber Filled with Foundry Waste Derived Fillers

Abstract

The main aim of this study is to evaluate the possibility of applying foundry dust (FD) derived filler for the preparation of natural rubber (NR) based composites by characterizing the mechanical properties. The as-received FD was processed via a simple and low-cost procedure, including sieving, deironing and milling using a variety of industrial equipment. FD powders before and after silane coupling agent (Si 69) modification were used as fillers for NR. NR composites inserted with different content of modified and unmodified FD up to 50 phr were prepared via dry-mixing method. Then, comprehensive mechanical performances were performed on the corresponding vulcanizates. It was demonstrated that NR composite filled with 50 phr of modified FD exhibited optimized comprehensive mechanical performance. Tear strength and hardness is increased by 21.3% and 12.8% than pure NR, respectively. Tensile strength is reduced by 21% and elongation at break remained nearly unchanged. Additionally, the composite showed a large increment of 50.9% for its wet grip property, while exhibited an increment of only 11.9% for its rolling resistance in comparison with the composite containing 10 phr of FD. The findings of this study may provide a new application area for the large amounts of utilization of foundry waste with a high level of value being added.

Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range

“…It also reflects the dissipation of energy. As can be seen from the Figure 5, the damping ratio λ can be defined with Equation (8) according to Hardin and Drmevich [39]. The damping ratio is an important dynamic parameter of a soil that expresses the hysteresis characteristics of its stress-strain behavior under cyclic loading.…”

“…This excessive accumulation threatens both environmental and human health [ 5 , 6 ]. However, the increasing volume of discarded rubber tires has garnered interest in developing new methods for reusing these materials [ 7 , 8 , 9 ], and thus motivated researchers to characterize the general geotechnical properties of sand–rubber mixtures [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Improvement of mechanical and antibacterial properties of silica‐filled styrene butadiene rubber composite by using cinnamaldehyde

“…This was due to the incompatibility between silica and SBR matrix as silica particles are highly polar while the SBR matrix is a non‐polar material. [ 22 ] By comparing the SEM micrographs of the modified composites (Figure 7B–D) with that of the unmodified composite (Figure 7A), it was found that the distribution of silica within the SBR matrix was improved. This was attributed to the surface modification of silica by CAD, which reduced the surface hydrophilicity of silica and thus improved its dispersion within rubber matrix.…”

“…The increase in the tensile properties of the modified composites was due the surface modification of silica surface by CAD which improved the interfacial adhesion between SBR matrix and silica. [22][23][24] Accordingly, the stress transfer from SBR matrix to silica was improved. [25] Moreover, it was observed from this figure that the tensile properties of modified composites showed an increase with increasing amount of CAD up to 3 g of CAD and decreasing with the use of an excessive amount of CAD, exceeding 3 g, (S6 composite).…”

Investigation of the structure, magnetic, rheological and mechanical properties of EPDM rubber/Cu-Al-Zn alloy composites

“…The reduction in the tensile strength can be observed in presence coupling agent (TMSPM) which may be due to the agglomeration and the increased Cu-alloy contents. On the other hand the using of coupling agent (TMSPM) with Cu-alloy leads to the formation of a continuous layer between the EPDM matrix and the copper alloy particles [21,22].…”