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Abstract <p>Carbon nanotubes (CNTs) are promising nanofillers for enhancing the performance of chloroprene rubber/natural rubber (CR/NR) composites. In this study, CNTs were incorporated into CR/NR blends at loadings up to 10 phr using melt mixing, and their influence on curing, mechanical and physical properties was systematically evaluated. Key properties studied included tensile strength, stress at 100% elongation, elongation at break, tear strength, hardness, rebound resilience, abrasion resistance, compression set, crosslink density and swelling behaviour. CNT addition led to higher cure torque and shorter cure times, indicating accelerated crosslinking. Mechanical testing revealed that tensile strength and stress at 100% elongation improved by 60 and 52%, respectively, at 6 phr CNTs, while elongation at break decreased by 32%. Hardness and abrasion resistance also increased, whereas rebound resilience declined. Swelling resistance improved up to 6 phr and decreased at higher loadings.</p> Graphical Abstract <p></p>

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The effect of carbon nanotubes (CNTs) on the mechanical properties of CR/NR composites

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • K Parthasarathy,
  • S Baskar,
  • S Vishvanathperumal

摘要

Abstract

Carbon nanotubes (CNTs) are promising nanofillers for enhancing the performance of chloroprene rubber/natural rubber (CR/NR) composites. In this study, CNTs were incorporated into CR/NR blends at loadings up to 10 phr using melt mixing, and their influence on curing, mechanical and physical properties was systematically evaluated. Key properties studied included tensile strength, stress at 100% elongation, elongation at break, tear strength, hardness, rebound resilience, abrasion resistance, compression set, crosslink density and swelling behaviour. CNT addition led to higher cure torque and shorter cure times, indicating accelerated crosslinking. Mechanical testing revealed that tensile strength and stress at 100% elongation improved by 60 and 52%, respectively, at 6 phr CNTs, while elongation at break decreased by 32%. Hardness and abrasion resistance also increased, whereas rebound resilience declined. Swelling resistance improved up to 6 phr and decreased at higher loadings.

Graphical Abstract