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<p>This study centers on developing ethylene propylene diene monomer/styrene butadiene rubber (EPDM/SBR) composites reinforced with multiwalled carbon nanotubes (MWCNTs) functionalized using the imidazolium-based ionic liquid 1‑ethyl‑3‑methylimidazolium bromide (EMIM‑Br). The functionalized CNTs (EMIM‑Br@CNTs) were incorporated into the rubber matrix to enhance overall performance. The work examines the effects of EMIM‑Br@CNTs on curing characteristics, mechanical performance, compression set, swelling resistance, and tensile fracture morphology. Curing analysis showed that increasing EMIM‑Br@CNTs content raised the minimum torque, maximum torque, delta torque, and cure rate index, while reducing scorch time and optimum cure time. Mechanically, tensile strength and stress at 100% elongation improved up to 5 phr loading, then declined at higher levels. Tear strength, hardness, abrasion resistance, and compression set increased consistently with EMIM‑Br@CNTs content, whereas elongation at break and rebound resilience decreased. Swelling resistance and crosslink density followed a similar trend, peaking at 5 phr before dropping at higher loadings.</p>

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Mechanical and swelling resistance properties of EPDM/SBR composites reinforced with imidazolium ionic liquid (1-ethyl-3-methylimidazolium bromide)-modified carbon nanotubes

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • S. Vishvanathperumal,
  • K. Manimaran,
  • S. Praveenkumar

摘要

This study centers on developing ethylene propylene diene monomer/styrene butadiene rubber (EPDM/SBR) composites reinforced with multiwalled carbon nanotubes (MWCNTs) functionalized using the imidazolium-based ionic liquid 1‑ethyl‑3‑methylimidazolium bromide (EMIM‑Br). The functionalized CNTs (EMIM‑Br@CNTs) were incorporated into the rubber matrix to enhance overall performance. The work examines the effects of EMIM‑Br@CNTs on curing characteristics, mechanical performance, compression set, swelling resistance, and tensile fracture morphology. Curing analysis showed that increasing EMIM‑Br@CNTs content raised the minimum torque, maximum torque, delta torque, and cure rate index, while reducing scorch time and optimum cure time. Mechanically, tensile strength and stress at 100% elongation improved up to 5 phr loading, then declined at higher levels. Tear strength, hardness, abrasion resistance, and compression set increased consistently with EMIM‑Br@CNTs content, whereas elongation at break and rebound resilience decreased. Swelling resistance and crosslink density followed a similar trend, peaking at 5 phr before dropping at higher loadings.