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<p>This study explores the curing behavior, physical characteristics, and mechanical performance of ethylene–propylene–diene monomer/acrylonitrile–butadiene rubber (EPDM/NBR) composites reinforced with surface-modified graphene oxide (mGO), highlighting their suitability for flexible and durable engineering applications. The curing parameters, including cure rate index, optimum cure time, scorch time, torque difference, maximum torque, and minimum torque, were systematically evaluated. Physical properties such as hardness and rebound resilience, along with mechanical properties including tensile strength, 100% modulus, tear strength, elongation at break, compression set, and abrasion resistance, were comprehensively analyzed. To enhance filler dispersion and interfacial adhesion within the EPDM/NBR matrix, graphene oxide (GO) was functionalized using 3-aminopropyltriethoxysilane (KH550) and 4,4′-diphenylmethane diisocyanate (MDI). The modified GO was incorporated at loadings of 1–8 phr through melt mixing on a two-roll mill, followed by vulcanization using a hydraulic press. Field emission scanning electron microscopy (FESEM) revealed that surface modification effectively reduced particle size and improved dispersion uniformity. Consequently, the MDI-functionalized GO (MIGO) system exhibited superior mechanical performance compared to KH550-functionalized GO (KHGO). Overall, MIGO-reinforced EPDM/NBR composites demonstrate strong potential for advanced sealing and gasketing applications requiring excellent mechanical strength, elasticity, and wear resistance.</p> Graphical Abstract <p></p>

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Enhanced properties of EPDM/NBR rubber blends reinforced with surface-modified graphene oxide

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • S. Vishvanathperumal,
  • A. Kannan,
  • S. Dhanasekar

摘要

This study explores the curing behavior, physical characteristics, and mechanical performance of ethylene–propylene–diene monomer/acrylonitrile–butadiene rubber (EPDM/NBR) composites reinforced with surface-modified graphene oxide (mGO), highlighting their suitability for flexible and durable engineering applications. The curing parameters, including cure rate index, optimum cure time, scorch time, torque difference, maximum torque, and minimum torque, were systematically evaluated. Physical properties such as hardness and rebound resilience, along with mechanical properties including tensile strength, 100% modulus, tear strength, elongation at break, compression set, and abrasion resistance, were comprehensively analyzed. To enhance filler dispersion and interfacial adhesion within the EPDM/NBR matrix, graphene oxide (GO) was functionalized using 3-aminopropyltriethoxysilane (KH550) and 4,4′-diphenylmethane diisocyanate (MDI). The modified GO was incorporated at loadings of 1–8 phr through melt mixing on a two-roll mill, followed by vulcanization using a hydraulic press. Field emission scanning electron microscopy (FESEM) revealed that surface modification effectively reduced particle size and improved dispersion uniformity. Consequently, the MDI-functionalized GO (MIGO) system exhibited superior mechanical performance compared to KH550-functionalized GO (KHGO). Overall, MIGO-reinforced EPDM/NBR composites demonstrate strong potential for advanced sealing and gasketing applications requiring excellent mechanical strength, elasticity, and wear resistance.

Graphical Abstract