- 學位論文
PMMA/反應型黏土奈米複合材料的製備與性質研究
Synthesis and Properties of PMMA/ Reactive Clay Nanocomposites
摘要
本研究主要目的是PMMA(聚甲基丙烯酸甲酯)/反應型黏土奈米 複材的製備與性質研究。實驗分為二個部份：第一部分是先合成 hexadecyltriphenyl-phosphonium bromide ， 將此種改質劑與 3-(Trimethoxysilyl) propyl methacrylate 一起改質蒙脫土。第二部份是 將改質好的有機黏土(Organoclay)以反應方式製備PMMA/反應型黏 土奈米複材。製備好的奈米複合材料以XRD 及TEM 測量有機黏土 在此材料的分布情形；以UV 測其透光度；以DSC 及TGA 測其熱性 質；以LOI 測試其耐燃性質。結果顯示，有改質過的有機黏土分散效 果比未改質黏土好，基材為插層/剝離的結構。由UV 結果可知，添 加有機黏土會降低基材的透光性。由TGA 圖可知，添加有機黏土會 提升奈米複材的熱穩定性。由DSC 圖可知，玻璃轉移溫度會提高。 由LOI 數據可知，加入含磷的改質劑會增加奈米複材的耐燃性，並且 只要添加很少量的有機黏土，就可以提升奈米複材的耐熱及耐燃性 質。
並列摘要
In this study, a series of PMMA (poly methyl methacrylate)/Reactive Clay nanocomposites were prepared. The preparation of the nanocomposites contains two parts. In the first part, the synthesized hexadecyltriphenyl-phosphonium bromide and 3-(Trimethoxysilyl)propylmethacrylate were used to modify the montmorillonite by the ion exchange reaction and the grafting method, respectively. In the second part, the as-prepared organoclay was added in PMMA as a filler to form the PMMA/ Reactive Clay nanocomposites by the reactive method. The results of X-ray diffraction (XRD) and Transmission Electron Microscope (TEM) showed that the organoclays were well dispersed in the PMMA matrix with both intercalation and exfoliation structures. The thermal properties of the nanocomposites investigated by the DSC and TGA measurements showed that the thermal stability and the glass transition temperature of the nanocomposites were increased with the dispersed organoclay content and were higher than that with non-modified montmorillonite clay. The UV/VIS spectra of the nanocomposites indicated that the transparency of the nanocomposite was decreased with increase of the organoclay content. The LOI values of the nanocomposites revealed that the flame retardancy of PMMA was significantly improved by addition of a small amount of the as-prepared reactive organoclay.
參考文獻
延伸閱讀
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