Flame Retardancy of Polylactic Acid as a Non-petroleum Polyester

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  • YAMASHITA Takehiko
    AVC Devices Development Center, Panasonic AVC Networks Company, Matsushita Electric Industrial Co., Ltd.
  • KIDA Shinya
    Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
  • ISHIKAWA Tomoyuki
    Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
  • TAKEDA Kunihiko
    Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University Institute for Advanced Research, Nagoya University

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  • ポリ乳酸の難燃特性
  • ポリ ニュウサン ノ ナンネントクセイ

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Abstract

The combustion and flame retardancy of polylactic acid, one of the non-petroleum polymers, have been studied. Red phosphorous, which is used as a flame retardant for polyesters prepared from petroleum, does not restrain its combustion, whereas a halogen flame retardant shows its effect by stopping radical chain reactions in the gas phase. Some metal-organic complexes, especially iron and copper complexes and their catalysts on porous silica show excellent results. The lower the degradation temperature in the initial stage and at 50% degradation are, the shorter the combustion times are. The ignition times are not affected by the degradation temperature. These tendencies are different from those observed during the combustion test of the polyesters prepared from petroleum. The combustion is retarded because the concentration of the degradation products in the lower temperature is too low for ignition and because the average molecular weight of the products is low.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 63 (9), 577-585, 2006

    The Society of Polymer Science, Japan

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