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題 名 | Preparation of an Azo-Clay Intercalation Compound and Phosphorus-containing Epoxy Nanocomposites: Characterization and Thermal Properties=偶氮奈米黏土之合成及其含磷環氧樹脂奈米黏土複合材料之製備--特性及熱性質探討 |
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作 者 | 湯仁忠; 楊行中; 陳玉惠; | 書刊名 | 親民學報 |
卷 期 | 12 民95.07 |
頁 次 | 頁151-166 |
分類號 | 440.34 |
關鍵詞 | 偶氮奈米黏土; 含磷環氧樹脂; 奈米複合材料; 熱重量分析儀; Azo-clay; DOPO-containing epoxy; Nanocomposites; TGA; |
語 文 | 英文(English) |
中文摘要 | 將合成之偶氮四級銨鹽化合物,利用離子交換法改質黏土(clay),製備一新穎之偶氮奈米黏土(azo-clay)。並將此合成之偶氮奈米黏土掺入含磷環氧樹脂及芳香族二胺(DDS)中並反應製備奈米黏土複合材料,偶氮奈米黏土在硬化後之分散性可藉由X光繞射儀(XRD)及掃描式電子顯微鏡(SEM)予以分析證明。藉由熱重量分析儀(TGA)分析奈米黏土複合材料之熱安定性及熱分解行為,分析方法包括:恆溫熱分析、IPDT,燃燒殘餘量(char residule)、限氧指數(LOI)、熱分解活化能等。 含磷環氧樹脂因偶氮奈米黏土的掺入,使得奈米複合材料耐熱性、限氧指數及燃燒殘餘量獲得提升。本研究亦利用可信度較高之Ozawa方法分析奈米黏土複合材料之熱分解活化能,在空氣狀態下所得之熱分解活化能數據與IPDT數值結果相吻合,證明在空氣狀態下熱氧化分解過程中含磷環氧樹脂與偶氮奈米黏土產生協同效應,但此協同效應並未完全表現在限氧指數上。 |
英文摘要 | A new kind of quaternary azo-compound, triethyl-{6-[4-(nitro-phenylazo)-phenyloxy]-hexyl}-ammonium; bromide was synthesized. Clay was modified with the quaternary azo-compound with ion exchange and the resulting azo-clay was dispersed in DOPO-containing epoxy/DOS system to form epoxy nanocomposites. The dispersion state of the azo-clay in the matrix was investigated by X-ray diffraction and scanning electronic microscopy (SEM). The thermal stability and thermal degradation behavior of the azo-clay nanocomposites were examined by TGA. Detailed and precise factors on the thermal stability based on the weight remaining of characteristic temperature, long time isothermal heating, integral procedure decomposition temperature (IPDT), limiting oxygen index (LOI) and activation energy (Ea) of the thermal decomposition reaction were studies. Dispersion of the nano-scale azo-clay into the phosphorus-containing epoxy resins certainly enhanced their thermal stability and char residue. Using coast-redfern eq and ozawa methods estimated the activation energies of thermal degradation. From the more reliable data of the ozawa methods, that the thermal-oxidative degradation behavior coincide with the values of IPDT having synergistic effect heating in air. But the synergistic effect was not obviously observed from the LOI's performance. |
本系統中英文摘要資訊取自各篇刊載內容。