Poly (MMA-co-OVPOSS) Organic/inorganic Hybrid Nanocomposites: Preparation and Tg Enhancement Mechanism
The soluble poly (methyl methacrylate-co-octavinyl- polyhedral oligomeric silsesquioxane) (PMMA-POSS) hybrid nanocomposites with improved T<,g> and high thermal stability were synthesized by free radical polymerization and characterized by FTIR, high- resolution H NMR, <29>Si NMR, GPC, DSC and TGA technologies. The DSC and TGA measurements indicated that the hybrid nanocomposites had higher T<,g> and better thermal properties than the pure PMMA homopolymer. The T<,g> increase mechanism was investigated using FTIR technique, displaying that the dipole-dipole interaction between PMMA and POSS also plays very important role to the T<,g> improvement besides the molecular motion hindrance from the hybrid structure. The thermal stability enhances with increase of POSS content, which is mainly attributed to the incorporation of nanoscale inorganic POSS uniformly dispersed at molecular level.
nanocomposites polysilsesquioxanes polymethyl methacrylate thermal properties
YANG Benhong LI Jirong GUO Quanzhen GUANG shanyi XU Hongyao
School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China College of Material Science and Engineering & State Key Laboratory of Chemical Fibers and Polymeric College of Material Science and Engineering & State Key Laboratory of Chemical Fibers and Polymeric
国际会议
上海
英文
829-830
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）