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<p>Graphene oxide (GO)-modified ethylene-propylene-diene monomer/acrylonitrile-butadiene rubber (EPDM/NBR) composites were developed via melt compounding using three functional agents: octadecylamine (ODA), 3-aminopropyltriethoxysilane (KH550), and 4,4′-diphenylmethane diisocyanate (MDI). These modifiers tailored the surface chemistry of GO to enhance interfacial compatibility and dispersion within the rubber matrix. The impact of each modified GO system on curing behaviour, mechanical performance, and solvent resistance was systematically studied. Mechanical properties were evaluated in accordance with ASTM standards: tensile strength and elongation at break (ASTM D412), tear strength (ASTM D624), hardness (ASTM D2240), abrasion resistance (ASTM D5963), and rebound resilience (ASTM D2632). Results showed that 5 phr (parts per hundred rubber) filler loading yielded optimum performance, with GO-MDI delivering the highest improvements (137% in tensile strength) due to its strong chemical interaction with the matrix. In contrast, unmodified GO exhibited poor dispersion and minimal reinforcement. Beyond 5 phr, mechanical and crosslinking properties declined due to filler agglomeration. This study highlights the importance of tailored nanofiller functionalisation in overcoming filler-matrix incompatibility and opens a pathway for designing multifunctional elastomeric materials for advanced sealing, automotive, and chemical-resistant applications.</p>

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Preparation and properties of graphene oxide-modified ethylene-propylene-diene monomer and acrylonitrile-butadiene rubber composites using octadecylamine, 3-aminopropyltriethoxysilane, and 4,4′-diphenylmethane diisocyanate

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • S. Vishvanathperumal,
  • A. Kannan

摘要

Graphene oxide (GO)-modified ethylene-propylene-diene monomer/acrylonitrile-butadiene rubber (EPDM/NBR) composites were developed via melt compounding using three functional agents: octadecylamine (ODA), 3-aminopropyltriethoxysilane (KH550), and 4,4′-diphenylmethane diisocyanate (MDI). These modifiers tailored the surface chemistry of GO to enhance interfacial compatibility and dispersion within the rubber matrix. The impact of each modified GO system on curing behaviour, mechanical performance, and solvent resistance was systematically studied. Mechanical properties were evaluated in accordance with ASTM standards: tensile strength and elongation at break (ASTM D412), tear strength (ASTM D624), hardness (ASTM D2240), abrasion resistance (ASTM D5963), and rebound resilience (ASTM D2632). Results showed that 5 phr (parts per hundred rubber) filler loading yielded optimum performance, with GO-MDI delivering the highest improvements (137% in tensile strength) due to its strong chemical interaction with the matrix. In contrast, unmodified GO exhibited poor dispersion and minimal reinforcement. Beyond 5 phr, mechanical and crosslinking properties declined due to filler agglomeration. This study highlights the importance of tailored nanofiller functionalisation in overcoming filler-matrix incompatibility and opens a pathway for designing multifunctional elastomeric materials for advanced sealing, automotive, and chemical-resistant applications.