Abstract: KH-570 was applied to modify the surface capability of the Al2O3. The modified Al2O3 were dispersed in methyl methyl methacrylate. The in-situ polymerization was used to prepare the PMMA/Al2O3 composites, in which azodiisobutyronitrile was used as initiator. FTIR、UV、DSC and TG were applied to characterized the prepared composites. The UV experimental results demonstrated that anti ultraviolet capability of the composites was obtained owing to the adding of Al2O3. With the increasing of the amount of Al2O3, the anti ultraviolet capability of the composites increased gradually. The experimental results of Tg and the solubility of PMMA/Al2O3 composites revealed that the heat stability and solubility of the composites increased with the increasing of the amount of Al2O3. Meanwhile, the molecular weight of PMMA in the composites increased with the increasing of the amount of Al2O3.

Key words: alumina, poly(methyl methacrylate), nanocomposite, in-situ polymerization