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<p>Strong interfacial adhesion between the filler and polymer matrix is essential for developing high‑performance composites. In this work, ethylene–propylene–diene monomer/styrene–butadiene rubber blends were reinforced with multi‑walled carbon nanotubes (CNTs) functionalised with the imidazolium‑based ionic liquid 1‑butyl‑3‑methylimidazolium bis(trifluoromethylsulfonyl)imide (BMI), hereafter referred to as BMI@CNTs. Filler–matrix interactions were examined through mole percent uptake (MPU) measurements in various solvents, while cure characteristics were evaluated using a moving die rheometre. Mechanical performance was assessed via tensile, tear, and hardness testing, complemented by swelling resistance, compression set, and crosslink density analyses to determine the effect of BMI@CNT incorporation. Increasing CNT loading elevated torque values and shortened cure times. Tensile strength and 100% modulus increased with filler addition up to 5 phr before declining at higher loadings. Remarkably, BMI@CNT‑filled systems exhibited up to a 261% rise in tensile strength and a 92% increase in 100% modulus relative to the unfilled vulcanisates. Tear strength, hardness, abrasion resistance, swelling resistance, compression set, and crosslink density also consistently improved with higher BMI@CNT contents.</p>

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Role of BMI-modified carbon nanotubes in enhancing the swelling resistance and mechanical performance of EPDM/SBR nanocomposites

  • 期刊论文

  • 发表日期：

    2026年7月19日

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  • S. Vishvanathperumal,
  • K. Manimaran,
  • S. Bhanuchandar,
  • G. Anand

摘要

Strong interfacial adhesion between the filler and polymer matrix is essential for developing high‑performance composites. In this work, ethylene–propylene–diene monomer/styrene–butadiene rubber blends were reinforced with multi‑walled carbon nanotubes (CNTs) functionalised with the imidazolium‑based ionic liquid 1‑butyl‑3‑methylimidazolium bis(trifluoromethylsulfonyl)imide (BMI), hereafter referred to as BMI@CNTs. Filler–matrix interactions were examined through mole percent uptake (MPU) measurements in various solvents, while cure characteristics were evaluated using a moving die rheometre. Mechanical performance was assessed via tensile, tear, and hardness testing, complemented by swelling resistance, compression set, and crosslink density analyses to determine the effect of BMI@CNT incorporation. Increasing CNT loading elevated torque values and shortened cure times. Tensile strength and 100% modulus increased with filler addition up to 5 phr before declining at higher loadings. Remarkably, BMI@CNT‑filled systems exhibited up to a 261% rise in tensile strength and a 92% increase in 100% modulus relative to the unfilled vulcanisates. Tear strength, hardness, abrasion resistance, swelling resistance, compression set, and crosslink density also consistently improved with higher BMI@CNT contents.