A Comparative Study of PMMA/Mesoporous Silica, PMMA/Clay, and PMMA/Colloidal SiO2 Nanocomposites Made by Emulsion Polymerization
作者：F. A. Zhang, D. K. Lee, and T. J. Pinnavaia
關(guān)鍵字：PMMA， composite， mesoporous silica
論文來源：會(huì)議
具體來源：Abstract preprint for the 238th ACS National Meeting & Exposition. (Web of Science: V16HY)
發(fā)表時(shí)間：2009年
PMMA/mesoporous silica
nanocomposites were prepared via in-situ emulsion polymerization of methyl
methacrylate and a large pore size MSU-F silica. PMMA/clay, PMMA/colloidal SiO2 nanocomposites, and pure PMMA were also made by same method. The thermal stability
and mechanical properties were characterized by thermogravimetric analysis, differential
scanning calorimetry, and dynamic mechanical analysis, respectively. The
morphology was observed with transmission electron microscope. The results
indicate that the thermal stability of the PMMA/MSU-F and PMMA/clay nanocomposites
is increased in comparison to pure PMMA. The former displays the best thermal
stability, while the latter exhibits a narrowed decomposition profile. The
glass transition temperature (Tg) is obviously increased for the PMMA/MSU-F and
PMMA/clay nanocomposites. The storage
modulus of the PMMA/MSU-F and PMMA/clay nanocomposites both increase, the latter
shows higher value at higher temperature also. However, the PMMA/ colloidal SiO2 nanocomposite only achieves essentially the same thermal stability, Tg and storage
modulus as pure PMMA.