成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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9 巻, 12 号
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目次
巻頭言 : 特集　トライボロジー
解説 : 特集　トライボロジー
講座
会議・見本市だより
海外研究機関の紹介 : 29
論文
  • 同方向回転二軸スクリュ押出機におけるブチルアクリレートの塊状重合 その1
    実験的研究による操作条件の把握
    福岡 孝政, 岡部 優志
    1997 年 9 巻 12 号 p. 981-987
    発行日: 1997/12/20
    公開日: 2009/11/18
    DOIhttps://doi.org/10.4325/seikeikakou.9.981
    ジャーナル フリー
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    The continuous radical polymerization of butyl acrylate was studied using two sets of co-rotating twin screw extruder systems in order to understand the effects of operating conditions. With 2, 2′-Azobis (2, 4-dimethyl valeronitrile) as an initiator, the highest reaction conversion was obtained at a cylinder set temperature of 80°C. Both the reaction conversion and the molecular weight increased due to longer residence time when the monomer feed rate was decreased. Certain conditions of the polymerization resulted in a polymer with an average molecular weight Mw of over a million, while Mw/Mn was always from 2 to 3. The residual monomer was found to be eliminated by vacuum vent operating in a tandem extruder system which connected with the reactive extruder. Consequently, the polymerization should be performed at low temperature with the residual monomer removed by vacuum vent systems to obtain high molecular weight products.
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  • 同方向回転二軸スクリュ押出機におけるブチルアクリレートの塊状重合 その2
    反応操作の数値解析
    福岡 孝政
    1997 年 9 巻 12 号 p. 988-994
    発行日: 1997/12/20
    公開日: 2009/11/18
    DOIhttps://doi.org/10.4325/seikeikakou.9.988
    ジャーナル フリー
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    In regard to the radical polymerization of butyl acrylate (BA) in a self-wiping co-rotating twin screw extruder, a model of the reaction kinetics and design of the reaction operations were studied. The rate constant of the reaction (kp2/kt) was determined by tracing isothermal polymerizations using a differential scanning calorimeter (DSC). Based on these kinetic parameters and the tubular reactor model, a simulator was developed. The profiles of reaction conversion, concentration of initiator, temperature, kinetic chain length in the extruder were calculated by using the simulator. Finally, the consistency of these calculations was studied by comparing with experimental data from our early work.
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