Preparation of Imide-modified Benzoxazines and Characterization of Cured Films

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  • Nagata Tatsuya
    Department of Environmental and Life Sciences, Toyohashi University of Technology
  • Kurowarabi Kosaku
    Department of Environmental and Life Sciences, Toyohashi University of Technology
  • Kawauchi Takehiro
    Department of Environmental and Life Sciences, Toyohashi University of Technology Frontier Research Center, Tokyo Institute of Technology (present address)
  • Matsumoto Akihiko
    Department of Environmental and Life Sciences, Toyohashi University of Technology
  • Furukawa Nobuyuki
    Department of Chemical and Biological Engineering, Sasebo National College of Technology
  • Takeichi Tsutomu
    Department of Environmental and Life Sciences, Toyohashi University of Technology

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We synthesized novel monofunctional and bifunctional benzoxazines having imide groups. Brown-colored transparent films were obtained by curing the benzoxazines up to 240 °C. Monofunctional benzoxazine gave brittle film, but bifunctional benzoxazine gave tough film. Viscoelastic analysis revealed that glass transition temperature of the polybenzoxazine film obtained from the bifunctional benzoxazine was 289 °C, about 90 °C higher than that of a typical polybenzoxazine. Thermogravimetric analyses revealed that the introduction of imide groups was also effective to improve the thermal stability of polybenzoxazines.

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