| Synthesis and Characterization of Modified Epoxy Resins by Silicic Acid Tetraethyl Ester and Nano-SiO2 |
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| 作者姓名： | 李海燕 张之圣 |
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| 作者单位： | SchoolofElectronicInformationEngineering,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | A kind of modified epoxy resins was obtained by condensation of epoxy resin with silicic acid tetraethyl ester(TEOS) and nano-SiO2. The reactions were performed with hydrochloric acid as a catalyst at 63℃. The structure, thermal stability and morphological characteristics of the modified epoxy resins were studied through infrared spectra (FF-IR) analysis, thermogravimetric (TG) analysis and scanning electron microscopy respectively. It has been found from the IR and TG study that modified epoxy resins have greater thermal stability than epoxy resins, and its thermal stability has been improved by the formation of inter-crosslinked network structure. The modified epoxy resins exhibit heterogeneous morphology and heterogeneity increases with more TEOS feeding, which in turn confirms the formation of inter-crosslinked network structure in modified epoxy resins.
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| 关 键 词： | 改性环氧树脂 硅酸四乙基酯 纳米二氧化硅 IR 热解重力分析 扫描电子显微镜 |
Synthesis and Characterization of Modified Epoxy Resins by Silicic Acid Tetraethyl Ester and Nano-SiO2 |
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| LI Hai-yan,ZHANG Zhi-sheng.Synthesis and Characterization of Modified Epoxy Resins by Silicic Acid Tetraethyl Ester and Nano-SiO2[J].Transactions of Tianjin University,2004,10(2):105-108. |
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| Authors: | LI Hai-yan ZHANG Zhi-sheng |
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| Abstract: | A kind of modified epoxy resins was obtained by condensation of epoxy resin with silicic acid tetraethyl ester(TEOS) and nano-SiO2. The reactions were performed with hydrochloric acid as a catalyst at 63 °C.The structure, thermal stability and morphological characteristics of the modified epoxy resins were studied through infrared spectra(FT-IR) analysis, thermogravimetric (TG) analysis and scanning electron microscopy respectively. It has been found from the IR and TG study that modified epoxy resins have greater thermal stability than epoxy resins, and its thermal stability has been improved by the formation of inter-crosslinked network structure. The modified epoxy resins exhibit heterogeneous morphology and heterogeneity increases with more TEOS feeding, which in turn confirms the formation of inter-crosslinked network structure in modified epoxy resins. |
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| Keywords: | epoxy resin silicic acid tetraethyl ester(TEOS) nano-SiO_2 IR thermogravimetric analysis |
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