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<p>The long-term stability of various polyolefins relies on antioxidants. Traditional methods such as physical blending or chemical modification often suffer from non-uniform dispersion, migration, or lack of universality, especially for ultra-high molecular weight polyethylene (UHMWPE). Developing a general strategy to access various polyethylene types bearing intrinsically antioxidant properties (defined as polyolefins with antioxidant properties produced via polymerization, without postpolymerization antioxidant addition) remains a challenge. Here, we present a Catalyst-Enabled Antioxidation Strategy (CEAS) using phenolic hydroxy-functionalized dual-functional catalysts that both catalyze polymerization and provide antioxidant capacity, enabling the production of&#xa0;various types of intrinsically antioxidant polyolefins. We further develop enhancement strategies via auxiliary antioxidants and biomass-supported heterogeneous catalysis to boost antioxidant properties. This approach ensures uniform dispersion, overcomes processing limitations, retains mechanical properties, and enhances antioxidant performance. Notably, CEAS-synthesized UHMWPE demonstrates resistance to oxidation during demanding processing such as high-temperature spinning and radiation-induced crosslinking.</p>

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A general strategy for access intrinsically antioxidant polyolefins

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月8日

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  • Feiran Yang,
  • Chao Li,
  • Fuzhou Wang,
  • Chen Zou,
  • Changle Chen

摘要

The long-term stability of various polyolefins relies on antioxidants. Traditional methods such as physical blending or chemical modification often suffer from non-uniform dispersion, migration, or lack of universality, especially for ultra-high molecular weight polyethylene (UHMWPE). Developing a general strategy to access various polyethylene types bearing intrinsically antioxidant properties (defined as polyolefins with antioxidant properties produced via polymerization, without postpolymerization antioxidant addition) remains a challenge. Here, we present a Catalyst-Enabled Antioxidation Strategy (CEAS) using phenolic hydroxy-functionalized dual-functional catalysts that both catalyze polymerization and provide antioxidant capacity, enabling the production of various types of intrinsically antioxidant polyolefins. We further develop enhancement strategies via auxiliary antioxidants and biomass-supported heterogeneous catalysis to boost antioxidant properties. This approach ensures uniform dispersion, overcomes processing limitations, retains mechanical properties, and enhances antioxidant performance. Notably, CEAS-synthesized UHMWPE demonstrates resistance to oxidation during demanding processing such as high-temperature spinning and radiation-induced crosslinking.