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<p>Multiwalled carbon nanotubes (MWCNTs) were functionalized through acid treatment and modified with 3-aminopropyltriethoxysilane (APTES) to enhance dispersion and interfacial bonding in ethylene-propylene-diene monomer/styrene-butadiene rubber (EPDM/SBR) composites. This study examines the effects of APTES-functionalized MWCNTs (sCNTs) and unmodified CNTs on mechanical properties and swelling resistance. Functionalization improves compatibility with the rubber matrix, enhancing reinforcement efficiency. Rheometric analysis shows that increasing sCNT content reduces scorch and cure times while improving crosslinking. Mechanical properties, including tensile strength and stress at 100% elongation, improve up to 5 phr sCNTs, but higher loadings lead to agglomeration. Tear strength, hardness, abrasion resistance, compression set, and swelling resistance also improve, indicating superior reinforcement compared to unmodified CNTs. Compared to base vulcanizates, tensile strength, stress at 100% elongation, and tear strength increase by 144%, 40%, and 109%, respectively. This study provides insights into high-performance EPDM/SBR composites for industrial applications.</p>

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Mechanical and Swelling Resistance Behavior of Ethylene-Propylene-Diene Monomer/Styrene-Butadiene Rubber (EPDM/SBR) Composites Reinforced with Aminosilane-Functionalized Multiwalled Carbon Nanotubes

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • S. Vishvanathperumal,
  • K. N. Ramu

摘要

Multiwalled carbon nanotubes (MWCNTs) were functionalized through acid treatment and modified with 3-aminopropyltriethoxysilane (APTES) to enhance dispersion and interfacial bonding in ethylene-propylene-diene monomer/styrene-butadiene rubber (EPDM/SBR) composites. This study examines the effects of APTES-functionalized MWCNTs (sCNTs) and unmodified CNTs on mechanical properties and swelling resistance. Functionalization improves compatibility with the rubber matrix, enhancing reinforcement efficiency. Rheometric analysis shows that increasing sCNT content reduces scorch and cure times while improving crosslinking. Mechanical properties, including tensile strength and stress at 100% elongation, improve up to 5 phr sCNTs, but higher loadings lead to agglomeration. Tear strength, hardness, abrasion resistance, compression set, and swelling resistance also improve, indicating superior reinforcement compared to unmodified CNTs. Compared to base vulcanizates, tensile strength, stress at 100% elongation, and tear strength increase by 144%, 40%, and 109%, respectively. This study provides insights into high-performance EPDM/SBR composites for industrial applications.