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Abstract <p>Poly(butylene succinate) (PBS) is a biodegradable polyester with favorable mechanical strength and thermoplastic processability, but limited heat resistance. To address this, natural rubber (NR) was incorporated into PBS, and a two-step cross-linking method was applied. Peroxide-induced dynamic vulcanization during melt blending, followed by thermal pressing, improved NR dispersion and interfacial adhesion. As a result, the toughness doubled compared to neat PBS, and the blends retained their shape at 180°C despite softening. The cross-linked network effectively prevented flow above PBS’s melting point. This strategy enhances PBS’s thermal stability, enabling its use in high-temperature, sustainable material applications.</p> Graphical abstract <p></p>

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Enhancement of thermomechanical properties of poly(butylene succinate)/natural rubber blends by dynamic vulcanization

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • Taiga Hamabe,
  • Akihide Sugawara,
  • Madhurangika Panchabashini Horathal Pedige,
  • Kyohei Sawaki,
  • Toyomitsu Seki,
  • Kenji Adachi,
  • Shingo Okuno,
  • Hiroshi Uyama

摘要

Abstract

Poly(butylene succinate) (PBS) is a biodegradable polyester with favorable mechanical strength and thermoplastic processability, but limited heat resistance. To address this, natural rubber (NR) was incorporated into PBS, and a two-step cross-linking method was applied. Peroxide-induced dynamic vulcanization during melt blending, followed by thermal pressing, improved NR dispersion and interfacial adhesion. As a result, the toughness doubled compared to neat PBS, and the blends retained their shape at 180°C despite softening. The cross-linked network effectively prevented flow above PBS’s melting point. This strategy enhances PBS’s thermal stability, enabling its use in high-temperature, sustainable material applications.

Graphical abstract