Flame Retardancy of Polylactic Acid Blended with Metal Oxides Catalysts

  • YAMASHITA Takehiko
    Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
  • MIZUNO Kohshiroh
    Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
  • UENO Tomonaga
    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

Bibliographic Information

Other Title
  • 金属酸化物触媒を用いた PLA の燃焼抑制
  • キンゾク サンカブツ ショクバイ オ モチイタ PLA ノ ネンショウ ヨクセイ

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Abstract

The combustion inhibition of polylactic acid (PLA) was examined from the viewpoint of its relationship to pyrolysis when metal oxide is added. The results showed that combustion was controlled by several kinds of metal oxides. The molecular weight of the drip that had melted and dropped during combustion was about 20000 g/mol, which is large compared to the burned neat sample. This result suggests that the sample fragmented without producing low molecular weight product materials that become volatile. It was observed that the samples that didnot show changes in the weight-loss Curves in thermo-gravimetric analyses did not burn. On the other hand, when a catalyst known to promote acute resolution was added, the weight-loss curve moved to lower temperatures, combustion became violent and the flame intensified and surged upwards. These results suggest that inhibition of combustion can be expected by: first, not lowering the weight loss temperature too drastically, and second, adding a catalyst that only severs the main chains of the polymer and thereby not emitting flammable gas components of low molecular weight.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 65 (4), 288-294, 2008

    The Society of Polymer Science, Japan

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