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<p>This study evaluated the effects of maleic anhydride (MA) coupling agent on the mechanical and thermal properties and long-term stability of post-consumer recycled (PCR) plastics. The addition of MA coupling agent increased the tensile strength by 32.12%, enhancing the mechanical durability of the recycled plastic. Furthermore, the melt index (MI) increased by 366.23%, significantly improving processability. Thermogravimetric analysis (TGA) results showed a significant improvement in thermal stability, and a lifetime prediction model estimated an extension of the material’s life by 532.66% at 200&#xa0;°C. These results demonstrate that MA coupling agent effectively suppresses long-term degradation at high temperatures. Therefore, MA coupling agents can simultaneously improve mechanical properties and recyclability and offer a potent solution for creating sustainable plastics within a circular economy.</p>

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Optimizing maleic anhydride content to enhance mechanical performance and thermal stability of recycled polyolefin blends

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月8日

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  • Sungwoong Choi,
  • Seongeun Jang,
  • Garam Do,
  • Patrick C. Lee,
  • Duyoung Choi

摘要

This study evaluated the effects of maleic anhydride (MA) coupling agent on the mechanical and thermal properties and long-term stability of post-consumer recycled (PCR) plastics. The addition of MA coupling agent increased the tensile strength by 32.12%, enhancing the mechanical durability of the recycled plastic. Furthermore, the melt index (MI) increased by 366.23%, significantly improving processability. Thermogravimetric analysis (TGA) results showed a significant improvement in thermal stability, and a lifetime prediction model estimated an extension of the material’s life by 532.66% at 200 °C. These results demonstrate that MA coupling agent effectively suppresses long-term degradation at high temperatures. Therefore, MA coupling agents can simultaneously improve mechanical properties and recyclability and offer a potent solution for creating sustainable plastics within a circular economy.