中文摘要
　　本研究主要目的為PMMA（聚甲基丙烯酸甲酯）/黏土奈米複合材料的製備與性質分析。實驗分為以下兩個部分：第一部份是利用含酚基之小分子改質劑來改質MMT，使改質黏土表面具有可和PMMA之C＝O產生氫鍵的酚基，利用高分子基材與黏土表面產生的氫鍵來幫助PMMA的插層。從XRD和TEM的分析結果可知，以PMMA為基材的奈米複材為插層/剝離、或完全剝離的微結構。由FTIR的分析結果可知，C＝O吸收峰在PMMA插層進入改質黏土層間後，有往低波數的方向偏移，證明了改質黏土表面的酚基確實和PMMA之C＝O產生氫鍵。並改以尺寸較小的黏土LAP，進行相同的實驗及分析，藉此觀察黏土尺寸對於複材微結構與性質的影響。並將此兩種複材與長碳鏈銨鹽改質黏土所製備的PMMA複材做比較，以DSC及TGA來分析氫鍵產生與否對複材熱穩定性的影響。
　　本研究第二部分是利用PEO會因Na+的吸引而吸附在Na+-LAP表面的特性，藉此特性將未改質黏土以PEO包覆後，導入與PEO相容的PMMA中，以此方式製備PMMA/Na+-LAP複材。利用PMMA與PEO間的作用力，增加Na+-LAP在PMMA中的分散性。改變PEO在複材中的比例，以TEM來觀察PEO含量改變時，Na+-LAP在複材中的分散行為。再利用DSC來觀察複材Tg的變化，並與不含Na+-LAP的摻合物做比較，藉此分析Na+-LAP在複材中的分散情況。

Abstract
　Poly(methyl methacrylate)(PMMA)/clay nanocomposites were prepared via exfoliation-absorption in this studied. This work contains two parts:
　In the first part, tyramine and aminophenol, which contains a phenol group, were used to modify smectite clay, such as montmorillonite (MMT), and Laponite (LAP). Therefore, the surface of the modified silicate layers was covered by phenol groups, which may form hydrogen bonds with the carbonyl groups of PMMA. PMMA can intercalate into the interlayer gallery through the interaction of hydrogen bonding. WAXD and TEM results show that the nanocomposites have a intercalated microstructure mixed with partially exfoliated silicate plates. In terms of FTIR analysis, the absorption bands of C=O group shifts to lower frequency after intercalation. This confirms that the phenol groups on the silicate surface do form hydrogen bond with PMMA. Moreover, the effect of the silicate size on the microstructure of nanocomposite is also investigated. Finally, the thermal stability of PMMA/clay nanocomposites with various modified clay were compared.
　The second part contains preparation and characterization of PMMA-PEO/LAP nanocomposites. PEO can be absorbed onto the surface of pristine laponite and is known to miscible with PMMA in the amorphous state. Keep the two facts in mind; PMMA-based nanocomposites with low mass fraction of PEO and LAP have been prepared though exfoliation-adsorption method, using DMF as the solvent. The microstructure and thermal properties of the nanocomposites have been studied in terms of TEM and DSC

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