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Effect of amine-functionalized silica nanoparticles on thermal and mechanical behaviors of DGEBA/IPD epoxy networks

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Abstract

In this work, diglycidyl ether of bisphenol A (DGEBA) epoxy resin was cured by isophorone diamine (IPD) hardener in the presence of amine-functionalized silica nanoparticles. Depending upon the aminated silica (AS) contents, two epoxy networks labeled by EP/AS-2.5 and EP/AS-5.0 were obtained. The amine functional groups can allow the nanoparticles to be covalently incorporated into the epoxy matrix. Two controls, including epoxy network loaded by pristine silica (EP/S-2.5) as well as neat epoxy network, were also prepared via a similar protocol. Thus, thermal and mechanical behaviors of the resulting materials were studied as a function of silica surface characteristics, i.e., hydrophilic vs. organo-modified surface, and its loading content. The initial decomposition temperatures (T IDT) and the temperatures of the maximum decomposition rate (T max) were improved. The AS nanoparticles could enhance the storage moduli (E′ values) of the epoxy networks at high-temperature region. Dynamic mechanical analyses also showed that the amine-functionalization of silica can lead to a superior interaction between the nanoparticles and the resulting DGEBA/IPD epoxy networks.

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Authors and Affiliations

  1. Faculty of Chemistry, Damghan University, Damghan, 36715-364, Iran

    Hossein Behniafar

  2. Islamic Azad University-Damghan Branch, Damghan, Iran

    Mohammad Kazem Nazemi

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  1. Hossein Behniafar
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  2. Mohammad Kazem Nazemi
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Correspondence to Hossein Behniafar.

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Behniafar, H., Nazemi, M.K. Effect of amine-functionalized silica nanoparticles on thermal and mechanical behaviors of DGEBA/IPD epoxy networks. Polym. Bull. 74, 3739–3749 (2017). https://doi.org/10.1007/s00289-017-1928-z

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  • DOI: https://doi.org/10.1007/s00289-017-1928-z

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