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<p>This study explores the influence of halloysite nanotubes (HNTs) on the performance characteristics of styrene-butadiene rubber (SBR) and carboxylated acrylonitrile butadiene rubber (XNBR) composites. HNTs were incorporated into the SBR/XNBR matrix at varying loadings (2, 4, 6, 8, and 10 parts per hundred rubber, phr) to assess their effects on curing behavior, mechanical strength, abrasion resistance, and solvent resistance. The incorporation of HNTs markedly accelerated the vulcanization process, as indicated by reduced scorch and optimum cure times, along with increased torque values during rheometric analysis. Among the tested formulations, the composite containing 6 phr HNTs demonstrated the most notable improvements, with tensile strength increasing by 160%, elongation at break by 24%, stress at 100% elongation by 97%, and tear strength by 91%, relative to the unfilled SBR/XNBR blend. In addition to enhanced mechanical performance, the inclusion of HNTs also improved the composites’ hardness, abrasion resistance, and compression set behavior, indicating increased crosslinking density and filler-matrix interaction. These findings suggest that HNTs serve as effective multifunctional nanofillers, capable of simultaneously reinforcing and optimizing the cure characteristics of SBR/XNBR rubber blends, with 6 phr identified as the optimal loading for balanced property enhancement.</p>

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Enhancing SBR/XNBR blend nanocomposites through HNTs reinforcement

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • V. Sivaramakrishnan,
  • S. Vishvanathperumal,
  • G. Anand,
  • V. Navaneethakrishnan

摘要

This study explores the influence of halloysite nanotubes (HNTs) on the performance characteristics of styrene-butadiene rubber (SBR) and carboxylated acrylonitrile butadiene rubber (XNBR) composites. HNTs were incorporated into the SBR/XNBR matrix at varying loadings (2, 4, 6, 8, and 10 parts per hundred rubber, phr) to assess their effects on curing behavior, mechanical strength, abrasion resistance, and solvent resistance. The incorporation of HNTs markedly accelerated the vulcanization process, as indicated by reduced scorch and optimum cure times, along with increased torque values during rheometric analysis. Among the tested formulations, the composite containing 6 phr HNTs demonstrated the most notable improvements, with tensile strength increasing by 160%, elongation at break by 24%, stress at 100% elongation by 97%, and tear strength by 91%, relative to the unfilled SBR/XNBR blend. In addition to enhanced mechanical performance, the inclusion of HNTs also improved the composites’ hardness, abrasion resistance, and compression set behavior, indicating increased crosslinking density and filler-matrix interaction. These findings suggest that HNTs serve as effective multifunctional nanofillers, capable of simultaneously reinforcing and optimizing the cure characteristics of SBR/XNBR rubber blends, with 6 phr identified as the optimal loading for balanced property enhancement.