Thermal Decomposition Behavior of Melamine Cyanurate

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  • SHIMASAKI Choichiro
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • MORIKOSHI Tamotsu
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • NAKAYAMA Hiroaki
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • TAKAKURA Makoto
    N issan Kagaku Kogyo Co. Ltd., Toyama Factory, Research and Development Center;
  • ONO Shin
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • YOSHIMURA Toshiaki
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • MORITA Hiroyuki
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;
  • TSUKURIMICHI Eiichi
    Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University;

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Other Title
  • メラミンシアヌレートの熱分解挙動

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Description

The thermal decomposition were studied for melamine cyanurate which was a very effective fire retardant for polyamide resins. The hydrogen bond distances increase with an increase in temperature. Some intermolecular hydrogen bond bridges of melamine cyanurate are broken at a temperature near 360 °C. At this temperature, melamine cyanurate do not always yield corresponding equimolar amounts of melamine and cyanuric acid. The pyrolysis of melamine cyanurate led to the formation of volatile or sublimate compounds such as ammonia, water, carbon dioxide, cyanic acid, melamine, and cyanuric acid. The resulting ammonium cyanate is due to the gas-phase reaction between ammonia and cyanic acid, and the deposited melamine cyanurate is also due to the gas-phase reaction between melamine and cyanuric acid sublimed. On the other hand, the residual melamine cyanurate condensed in the temperature range of 420 to 450 °C, and transformed to an material above 450 °C. The implications of thermal decomposition behavior for melamine cyanurate were discussed based on crystal structure and thermal decomposition products.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1996 (4), 389-395, 1996-04-10

    The Chemical Society of Japan

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