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Nano-AlN functionalization by silane modification for the preparation of covalent-integrated epoxy/poly(ether imide) nanocomposites

Authors

  • Jingkuan Duan,

    1. Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
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  • Chonung Kim,

    1. Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
    2. Department of Electrical Engineering, Kim Chaek University of Technology, Pyongyang, Democratic People's Republic of Korea
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  • Pingkai Jiang,

    1. Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
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  • Genlin Wang

    Corresponding author
    1. Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
    • Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China
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Abstract

Aluminum nitride nanoparticle (nano-AlN) organically modified with the silane-containing epoxide groups (3-glycidoxypropyltrimethoxy silane, GPTMS) was incorporated into a mixture of poly(ether imide) (PEI), and methyl hexahydrophthalic anhydride-cured bisphenol A diglycidyl ether grafted by GPTMS was prepared for nanocomposite. Scanning electron microscopy, transmission electron microscopy, and atomic force microscopy were used to investigate the microscopic structures of nanocomposites. According to experimental results, it was shown that addition of nano-AlN and PEI into the modified epoxy could lead to the improvement of the impact and bend strengths. When the concentrations of nano-AlN and PEI were 20 and 10 pbw, respectively, the toughness/stiffness balance could be achieved. Dynamic mechanical analysis (DMA) results displayed that two glass transition temperatures (Tg) found in the nanocomposites were assigned to the modified epoxy phase and PEI phase, respectively. As nano-AlN concentration increased, Tg value of epoxy phase had gradually increased, and the storage modulus of the nanocomposite at the ambient temperature displayed an increasing tendency. Additionally, thermal stability of the nanocomposite was apparently improved. The macroscopic properties of nanocomposites were found to be strongly dependent on their components, concentrations, dispersion, and resulted morphological structures. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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