Ｎ‐置換マレイミド及び無水マレイン酸とα‐メチルスチレンとの共重合体の熱分解に及ぼすイミド基及び酸無水物基の影響

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タイトル別名
  • Effects of imide and acid anhydride groups on the thermal degradation of N-substituted maleimide-.ALPHA.-methylstyrene and maleic anhydride-.ALPHA.-methylstyrene copolymers.
  • N チカン マレイミド オヨビ ムスイ マレインサン ト アルファ メチルスチ

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Thermal degradation of N-ethylmaleimide-α-methylstyrene (co-EMI), maleimide-α-methylstyrene (co-MI), and maleic anhydride-α-methylstyrene (co-MAn) copolymers was investigated in a stream of nitrogen (50 ml/min) or in vacuum over a temperature range of 200 to 360°C. Co-EMI and co-MI are thermally stable until 300°C, while co-MAn begins to degrade at a temperature of 260°C. The temperatures at which weight loss reaches to 50 wt% on heating the copolymers are 340°C for co-EMI and co-MI, and 310°C for co-MAn. The rate constant of the main chain scission of co-MAn is about 7 times that of co-EMI. The acid anhydride groups in the copolymer begin to decompose above 260°C, while imide ring groups are stable until 320°C. Pyrolysis products of the co-EMI are α-methylstyrene (MS), N-ethylmaleimide, and oligomers and those of co-MAn are MS, maleic anhydride, oligomers, and carbon dioxide. The degradation mechanism is discussed on the basis of the results obtained.

収録刊行物

  • 高分子論文集

    高分子論文集 45 (4), 333-338, 1988

    公益社団法人 高分子学会

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