Thermal Decomposition of 2, 4-Diphenyl-1-butene

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  • OGAWA Taichi
    Department of Industrial Chemistry, College of Science and Technology, Nihon University
  • KUROKI Takeshi
    Department of Industrial Chemistry, College of Science and Technology, Nihon University
  • IKEMURA Tadashi
    Department of Industrial Chemistry, College of Science and Technology, Nihon University

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Other Title
  • 2, 4-ジフェニル-1-ブテンの熱分解反応
  • 合成高分子材料の熱分解　ＸＩＩＩ　　２，４‐ジフェニル‐１‐ブテンの熱分解反応

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Description

To investigate the thermal decomposition mechanism of polystyrene in detail, 2, 4-diphenyl-1-butene was decomposed by using a flow reactor under the following conditions : temperature, 450-525°C ; residence time, 0.1-4.5 sec ; nitrogen to sample ratio by mol, 7.4. The bond dissociation energy of the allylic C-C bond in 2, 4-diphenyl-1-butene calculated from the heat of formation of radicals was lower by about 12 kcal/mol than those in 1-alkenes and the benzylic C-C bond in alkylbenzenes. The rate followed the first-order equation and the rate constant was calculated as k(sec-1) =3.61×1011exp(-47000/RT). In terms of the above results, 2, 4-diphenyl-1-butene was a thermally labile compound in comparison with 1-alkenes and alkylbenzenes. It was also concluded that cleavages of the allylic C-C bond occurred at the end of the chain, which have been considered as the initiation of the second stage in the thermal decomposition of polystyrene, did not occur.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1980 (5), 754-759, 1980-05-10

    The Chemical Society of Japan

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