Synthesis and Properties Of Poly(methyl methacrylate) /Clay Nanocomposites

• Main Authors: Chin-Chou Chang, 張欽超
• Other Authors: Sheng-Shu Hou
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/95365140162324374287

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 93 === 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