Effect of different nanostructured SiC on thermal, ablation and char layer mechanical properties of ethylene propylene diene monomer composites

Abstract

SiC nanowire (SiC‐NW) and SiC nanopowder (SiC‐NP) were used to reinforce ethylene propylene diene monomer (EPDM) composites to improve their ablation and erosion resistance. The mechanical and thermal properties of the composites were investigated. The ablation resistance and thermal insulation performance of the composites were evaluated based on the oxyacetylene ablation and ablation motor experiments. In addition, the particle erosion resistance of the char layer was characterized. The test and experimental results show that, compared with the basic formulation, the ablation resistance of the formulations containing SiC‐NW and SiC‐NP increased by 85.54% and 71.08%, respectively. The particle erosion resistance of the char layer increased by 80.61% and 63.39%, respectively. Meanwhile, the SiC nanofiller reduced the thermal insulation performance of the EPDM composites. Compared with the basic formulation, the maximum back temperature of the SiC‐NW and SiC‐NP formulations increased by 39.23% and 13.08%, respectively. It inferred that during the ablation process, the SiC nanofiller can not only promote the deposition reaction of pyrolysis gas, but also react with oxidizing components and the char layer at different temperatures, thus improving the ablation resistance of the EPDM composites and the strength of the char layer. However, the high thermal conductivity of SiC nanofiller reduces the thermal insulation performance of the composites.

Improving the ablative performance of epoxy‐modified vinyl silicone rubber composites by incorporating different types of reinforcing fibers

“…4 The commonly used flexible ablative materials include silicone rubber (SR), nitrile butadiene rubber (NBR), EPDM rubber, polyphosphonitrile, polyurethane elastomers, and so forth. 5,6 SR has the advantages of high thermal stability. 7 Liquid SR has the advantages of easy processability, superior thermal insulation properties, weathering, and aging resistance, as well as low vulcanization temperature.…”

“…Flexible ablative materials have an irreplaceable role due to their flexibility and good designability 4 . The commonly used flexible ablative materials include silicone rubber (SR), nitrile butadiene rubber (NBR), EPDM rubber, polyphosphonitrile, polyurethane elastomers, and so forth 5,6 . SR has the advantages of high thermal stability 7 .…”

Enhancing ablation and oxidation resistance of phenolic resin with modified pickling asbestos

“…Boron phenolic resin (BPR) is an ideal ablative polymer composite matrix for thermal protection systems in aerospace and military due to its stable carbon layer and high carbon content. [1][2][3] Currently, compounding with inorganic fillers is an effective strategy to improve the ablation resistance properties of BPR-based polymer composites. [4][5][6][7][8] The ceramic fillers can form dense ceramic phases at high temperatures and protect the internal material from the erosion of heat flow.…”

Enhanced mechanical and thermal properties of carbon fiber‐reinforced thermoplastic copoly(phthalazinone ether sulfone ketone) composites

“…[19][20][21] Silicon carbide nanowires (SiC NWs) possess excellent mechanical properties (such as high strength and modulus), making them good reinforcements for polymer composites. [22] However, systematic studies on the mechanical-thermal properties of SiC NWs reinforced thermoplastic composites are scarce. In this context, the effect of SiC NWs on the mechanical (interlayer, compression, and bending properties) and thermal properties of CF/PPBESK (Figure 1) composites was analytically investigated in this paper.…”