Effect of Acid Anhydride Group on Thermal Degradation of Methyl Methacrylate-Maleic Anhydride Copolymers

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  • AIDA Hiroshi
    Department of Industrial Chemistry, Faculty of Engineering, Fukui University
  • URUSHIZAKI Michio
    Department of Industrial Chemistry, Faculty of Engineering, Fukui University
  • KASAMATSU Joichi
    Department of Industrial Chemistry, Faculty of Engineering, Fukui University
  • KUROKAWA Yasushi
    Department of Industrial Chemistry, Faculty of Engineering, Fukui University
  • NOMURA Shinji
    Department of Industrial Chemistry, Faculty of Engineering, Fukui University

Bibliographic Information

Other Title
  • メタクリル酸メチル‐無水マレイン酸共重合体の熱分解に及ぼす酸無水物の影響
  • メタクリルサン メチルー ムスイ マレインサン キョウジュウゴウタイ ノ ネツ

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Description

The thermal degradation of methyl methacrylate-maleic anhydride copolymers (MMA-MAn) having a variety of the copolymer compositions has been investigated in the stream of nitrogen (50 ml/min) or in vacuum over the temperature range from 180 to 300°C. Copolymers are stable below 180°C, regardless of the copolymer composition. Above 180°C, the scission of the main chain bonds occurs initially, the rate of which increases with increasing the MAn content in the copolymer. Above 270°C, the weight loss increases remarkably. The main products of the degradation are oligomer, methyl methacrylate (MMA), methanol and carbon dioxide. The amount of MMA decreases with increasing the MAn content in the copolymer, whereas the amounts of methanol and carbon dioxide increase. It is suggested that methanol results from the MMA group adjacent to the MAn group in the copolymer. The degradation mechanism is discussed on the basis of the results obtained.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 41 (8), 437-443, 1984

    The Society of Polymer Science, Japan

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