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Preparation and characterization of epoxy nanocomposites by using PEO-grafted silica particles as modifier

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Abstract

EP/SiO2 nanocomposites, which contained PEO flexible chain, have been prepared via epoxy resin and PEO-grafted silica particles. The PEO-silica particles were obtained by endcapping PEO-1000 with toluene 2,4-diisocyanate (TDI), followed by a reaction with silica sols. The chemical structure of the products was confirmed by IR measurements, and the mechanical properties of composites such as impact strength, flexural strength, dynamic mechanical thermal properties were investigated. The results showed that the addition of the PEO-grafted silica particles to the epoxy/DDS curing system, the impact strength is 2 times higher than that of the neat epoxy. While the storage modulus and the glass transition temperature are a little changed. The morphological structure of impact fracture surface and the surface of the hybrid materials were observed by scanning electron microscope (SEM) and atomic force microscopy (AFM), respectively.

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Acknowledgements

Financial supports from the Natural Science Foundation of China (No.50473060), Financial supports from the Natural Science Foundation of Guangxi province (No.0447053) Financial supports from the Department of Education of Gunangxi Province ([2004] 20) are gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory of New Processing Technology for Nonferrous Metal Materials, Ministry of Education, Guilin, 541004, P.R. China

    Shao-Rong Lu, Chun Wei, Jin-Hong Yu, Xiao-Wang Yang & Yu-Mei Jiang

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  1. Shao-Rong Lu
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  2. Chun Wei
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  3. Jin-Hong Yu
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Correspondence to Shao-Rong Lu.

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Lu, SR., Wei, C., Yu, JH. et al. Preparation and characterization of epoxy nanocomposites by using PEO-grafted silica particles as modifier. J Mater Sci 42, 6708–6715 (2007). https://doi.org/10.1007/s10853-006-1492-7

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  • DOI: https://doi.org/10.1007/s10853-006-1492-7

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