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Surface improvement effect of silica nanoparticles on epoxy nanocomposites mechanical and physical properties, and curing kinetic

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In this paper, surface modification was performed on silica nanoparticles using 3-aminopropyl trietoxylsilane (APTES) and surface changes of nanoparticles were investigated using TEM and FE-SEM imaging. Furthermore, its physical and mechanical properties were investigated by building three samples including pure epoxy, epoxy/unmodified nano silica, and epoxy/modified nano silica with weights of 1, 3 and 5% of the nanoparticles to the whole system (epoxy and hardener). The results show that the modified nanoparticles were well dispersed in an epoxy matrix, and elastic modulus has improved. For example in a sample with 5% weight percentage of nano silica, the tensile elastic modulus, yield stress, and failure strain are increased by 77%, 124%, and 32%, respectively. Since the epoxy curing process is an important factor that affects the performance of the cured epoxy, curing process samples were analyzed using DSC. Also, various methods of activation energy were measured at the appropriate kinetic model. The reaction rate equation was obtained for each sample. The modified particles reduce the activation energy of the process compared to the two epoxy and epoxy/unmodified nano silica.

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Acknowledgments

The authors gratefully acknowledge research enter of the Islamic Azad University of Sari for the support of this work.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran

    Arash Kamran-Pirzaman & Sahra Babatabar

  2. Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran

    Yaser Rostamian

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  1. Arash Kamran-Pirzaman
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  2. Yaser Rostamian
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  3. Sahra Babatabar
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Correspondence to Arash Kamran-Pirzaman.

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Kamran-Pirzaman, A., Rostamian, Y. & Babatabar, S. Surface improvement effect of silica nanoparticles on epoxy nanocomposites mechanical and physical properties, and curing kinetic. J Polym Res 27, 13 (2020). https://doi.org/10.1007/s10965-019-1918-y

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