The outstanding versatility of ethylene propylene diene rubber(EPDM) has broadened its use in thermoplastic vulcanisates, electrical insulation, roofing membrane, hose, plastic impact modification, motor oil additive and automotive applications. EPDM is a type of self-reinforced rubber that limits i...
The outstanding versatility of ethylene propylene diene rubber(EPDM) has broadened its use in thermoplastic vulcanisates, electrical insulation, roofing membrane, hose, plastic impact modification, motor oil additive and automotive applications. EPDM is a type of self-reinforced rubber that limits its usage. Reinforcing EPDM with carbon black or resin is a possible solution. The reinforcing fillers for elastomers include carbon black, silica, clay, plastic and fibre. The dynamic mechanical properties are important parameters for determining the processing and use the properties of polymeric materials. For polymer compounds or polymer composites filled with inorganic particles, the relationship between the structure and properties tends toward greater complexity due to the formation of an interface between the components and between the fillers and matrix. The dynamic mechanical parameters of polymer materials, such as the storage modulus, loss modulus and mechanical damping, might be measured using a dynamic mechanical analysis instrument. In addition, dynamic mechanical measurements over a range of temperatures provide valuable insight into the structure, morphology and properties of polymer compounds. Dynamic mechanical analyses have been performed on polymer compounds. EPDM has been used for damping applications owing to its high heat stability. Therefore, it is expected that the compounding of carbon black with EPDM can enlarge the damping peak zone and produce a compounded, multi-functional damping material with good mechanical properties. This study measured the mechanical and damping properties of compounds including EPDM. Semi-reinforcing furnace black(SRF), high abrasion furnace black(HAF), acetylene black and carbon nanotube(CNT) were used as fillers. Sulfur and dicumyl peroxide(DCP) were used as curing agents. The mechanical properties, thermal resistance and damping properties of the compounds with EPDM and curing agent were examined, and the effects of the carbon black on these compounds were observed. The measurements were conducted using a moving die rheometer(MDR), durometer, universal testing machine(UTM), compression set and dynamic mechanical analysis(DMA). The hardness and tensile strength increased with increasing ethylene concentration in EPDM. Among the two curing agents, the increase of the heat resistance was most significant for DCP cross-linked EPDM compounds. So, DCP was used instead as a curing agent to be compared with sulfur. The hardness increased and the compression set improved when filler was added to EPDM compounds. EPDM-2320 has a low degree of cross-linking and the movement of molecules at higher temperature results in higher viscosity. In the inspecting temperature range, EPDM compound filled HAF and acetylene black had stable storage modulus. Furthermore, DMA indicated that the tan δ of the EPDM compounds obtained was enhanced by compounding with HAF and acetylene black.
The outstanding versatility of ethylene propylene diene rubber(EPDM) has broadened its use in thermoplastic vulcanisates, electrical insulation, roofing membrane, hose, plastic impact modification, motor oil additive and automotive applications. EPDM is a type of self-reinforced rubber that limits its usage. Reinforcing EPDM with carbon black or resin is a possible solution. The reinforcing fillers for elastomers include carbon black, silica, clay, plastic and fibre. The dynamic mechanical properties are important parameters for determining the processing and use the properties of polymeric materials. For polymer compounds or polymer composites filled with inorganic particles, the relationship between the structure and properties tends toward greater complexity due to the formation of an interface between the components and between the fillers and matrix. The dynamic mechanical parameters of polymer materials, such as the storage modulus, loss modulus and mechanical damping, might be measured using a dynamic mechanical analysis instrument. In addition, dynamic mechanical measurements over a range of temperatures provide valuable insight into the structure, morphology and properties of polymer compounds. Dynamic mechanical analyses have been performed on polymer compounds. EPDM has been used for damping applications owing to its high heat stability. Therefore, it is expected that the compounding of carbon black with EPDM can enlarge the damping peak zone and produce a compounded, multi-functional damping material with good mechanical properties. This study measured the mechanical and damping properties of compounds including EPDM. Semi-reinforcing furnace black(SRF), high abrasion furnace black(HAF), acetylene black and carbon nanotube(CNT) were used as fillers. Sulfur and dicumyl peroxide(DCP) were used as curing agents. The mechanical properties, thermal resistance and damping properties of the compounds with EPDM and curing agent were examined, and the effects of the carbon black on these compounds were observed. The measurements were conducted using a moving die rheometer(MDR), durometer, universal testing machine(UTM), compression set and dynamic mechanical analysis(DMA). The hardness and tensile strength increased with increasing ethylene concentration in EPDM. Among the two curing agents, the increase of the heat resistance was most significant for DCP cross-linked EPDM compounds. So, DCP was used instead as a curing agent to be compared with sulfur. The hardness increased and the compression set improved when filler was added to EPDM compounds. EPDM-2320 has a low degree of cross-linking and the movement of molecules at higher temperature results in higher viscosity. In the inspecting temperature range, EPDM compound filled HAF and acetylene black had stable storage modulus. Furthermore, DMA indicated that the tan δ of the EPDM compounds obtained was enhanced by compounding with HAF and acetylene black.
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#EPDM Carbon Black
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