Preparation and Properties of Polymethyl Mathacrylate-b-polyhedral Oligomeric Silsesquioxane Nanocompositest

摘要

Inorganic/organic nanocomposites were prepared by blending cage-like methyl methacrylate-modified polyhedral oligomeric silsesquioxane (MMA-POSS) with polymethyl mathacrylate (PMMA) in THE solvent. FTIR and ~(29)Si NMR were employed to characterize the structures of the nanocomposites. SEM images showed that the as-prepared films were smooth and no aggregation of MMA-POSS was observed. TGA and DSC results showed that the incorporation of small amount of nanosize MMA-POSS enhanced the thermal stability of PMMA. When 1.0 wt % of MMA-POSS was incorporated into PMMA matrix, the T_g and T_d increased by 16.9 and 21.0 °C, respectively.