Preparation and characterization of epoxy/SiO2 nanocomposites by cationic photopolymerization and sol–gel process |
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| Authors: | Yu‐Tie Bi Zhen‐Jiang Li Wei Liang |
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| Institution: | 1. Joint Laboratory for Extreme Condition Matter properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP, , Mianyang, Sichuan, 621010 China;2. College of science, Southwest University of Science and Technology, , Mianyang, Sichuan, 621010 China;3. Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics(CAEP), , Mianyang, Sichuan, 621900 China |
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| Abstract: | Epoxy/SiO2 nanocomposite materials were prepared by cationic photopolymerization and sol–gel process using a novel epoxy oligomer (EP‐Si(OC2H5)3) prepared by 3‐isocyanatopropyltriethoxysilane (IPTS)‐grafted bisphenol A epoxy resin and tetraethyl orthosilicate as inorganic precursor. The chemical structures of EP‐Si(OC2H5)3 were characterized by Fourier transformed infrared spectroscopy. Transmission electron microscopy showed that the in situ generated nano‐SiO2 dispersed uniformly in the EP matrix, and its average diameter is around 40 nm. The relationship between nanocomposite materials' thermal/mechanical properties and nano‐SiO2 introduced were studied by thermogravimetric analysis, dynamic mechanical analysis, and impact strength test. The results showed that the nanocomposite materials' thermal and mechanical properties improved a lot with increase of the SiO2 content. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | nanocomposites epoxy nano‐SiO2 cationic photopolymerization sol– gel process |
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