Preparation, thermal properties, and flame retardance of epoxy–silica hybrid resins

Authors

  • Ying-Ling Liu,

    Corresponding author
    1. Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Taoyuan, 320, Taiwan, Republic of China
    • Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Taoyuan, 320, Taiwan, Republic of China
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  • Chuan-Shao Wu,

    1. Department of Textile Engineering, Nan Ya Institute of Technology, Chungli, Taoyuan 320, Taiwan, Republic of China
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  • Yie-Shun Chiu,

    Corresponding author
    1. Chung San Institute of Science and Technology, Luntan, Taoyuan 325, Taiwan, Republic of China
    • Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Taoyuan, 320, Taiwan, Republic of China
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  • Wen-Hsuan Ho

    1. Chung San Institute of Science and Technology, Luntan, Taoyuan 325, Taiwan, Republic of China
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Abstract

A novel epoxy system was developed through the in situ curing of bisphenol A type epoxy and 4,4′-diaminodiphenylmethane with the sol–gel reaction of a phosphorus-containing trimethoxysilane (DOPO–GPTMS), which was prepared from the reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with 3-glycidoxypropyltrimethoxysilane (GPTMS). The preparation of DOPO–GPTMS was confirmed with Fourier transform infrared, 1H and 31P NMR, and elemental analysis. The resulting organic–inorganic hybrid epoxy resins exhibited a high glass-transition temperature (167 °C), good thermal stability over 320 °C, and a high limited oxygen index of 28.5. The synergism of phosphorus and silicon on flame retardance was observed. Moreover, the kinetics of the thermal oxidative degradation of the hybrid epoxy resins were studied. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 2354–2367, 2003

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