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<p>This study investigates the effect of incorporating various nanofillers, including nanoclay (NC), nanosilica (NS), halloysite nanotubes (HNTs), graphene oxide (GO), and carbon nanotubes (CNTs), on the properties of chloroprene rubber (CR)/natural rubber (NR) blends. The study examined curing behavior, mechanical performance, compression set, swelling resistance, and abrasion resistance. The composites were prepared using a two-roll mill, and their mechanical properties were evaluated in terms of tensile strength (TS), stress at 100% elongation (M100), hardness, elongation at break (EB), tear strength (TAS), and rebound resilience (RR). Curing studies indicated that nanofiller incorporation accelerated vulcanization and increased torque values, signifying higher crosslinking density. TS and M100 increased steadily up to a filler loading of 6 phr, after which they declined. Conversely, EB and RR decreased progressively with increasing filler content, while hardness, TAS, and compression set continued to rise. Among the fillers investigated, CNTs provided the most pronounced reinforcement, with CNT-filled CR/NR composites showing a 60% improvement in TS, a 62% increase in TAS, and a 52% enhancement in M100 relative to unfilled vulcanizates. These improvements were accompanied by a 32% reduction in EB and a 37% decrease in RR.</p> Graphical abstract <p></p>

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Comparative effect of nanoclay, nanosilica, halloysite nanotubes, graphene oxide, and carbon nanotubes on the mechanical properties of chloroprene rubber/natural rubber blends

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • K. Parthasarathy,
  • S. Baskar,
  • S. Vishvanathperumal

摘要

This study investigates the effect of incorporating various nanofillers, including nanoclay (NC), nanosilica (NS), halloysite nanotubes (HNTs), graphene oxide (GO), and carbon nanotubes (CNTs), on the properties of chloroprene rubber (CR)/natural rubber (NR) blends. The study examined curing behavior, mechanical performance, compression set, swelling resistance, and abrasion resistance. The composites were prepared using a two-roll mill, and their mechanical properties were evaluated in terms of tensile strength (TS), stress at 100% elongation (M100), hardness, elongation at break (EB), tear strength (TAS), and rebound resilience (RR). Curing studies indicated that nanofiller incorporation accelerated vulcanization and increased torque values, signifying higher crosslinking density. TS and M100 increased steadily up to a filler loading of 6 phr, after which they declined. Conversely, EB and RR decreased progressively with increasing filler content, while hardness, TAS, and compression set continued to rise. Among the fillers investigated, CNTs provided the most pronounced reinforcement, with CNT-filled CR/NR composites showing a 60% improvement in TS, a 62% increase in TAS, and a 52% enhancement in M100 relative to unfilled vulcanizates. These improvements were accompanied by a 32% reduction in EB and a 37% decrease in RR.

Graphical abstract