Synergistic Effect of Vitamin E Related Additives on Antioxidation of Polyolefin Resin

  • Katsuyama Kazuki
    Dept. of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University
  • Inoue Takeshi
    Fine Chemicals Lab., Research & Development Center, API Corp.
  • Takahashi Takeshige
    Dept. of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University
  • Kai Takami
    Dept. of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University

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Other Title
  • ポリオレフィン樹脂の酸化防止に対するビタミンE類似化合物の添加による相乗効果
  • ポリオレフィン ジュシ ノ サンカ ボウシ ニ タイスル ビタミン E ルイジ カゴウブツ ノ テンカ ニ ヨル ソウジョウ コウカ

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Abstract

To improve the antioxidative effect of polyolefin (PP or PE) resin, two types of antioxidants with structures similar to vitamin E (S-13 and S-19) were synthesized. The antioxidative activity of the compounds added to polypropylene as 0.005 wt% was examined by the melt-index and yellow index methods. The compounds had only antioxidative activity. The antioxidative activity significantly increased mixing with phenolic and phosphoric antioxidants. Investigation of the mechanism of the antioxidative activity revealed that hydrocarbon radicals produced by the thermal decomposition of polypropylene or polyethylene immediately reacted with the antioxidant to form stable product. The S-13 or S-19 antioxidants were regenerated by the reaction between the antioxidant radicals, and phenolic and phosphoric antioxidants.<br>

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