title: Synthesis and characterization of poly(methyl methacrylate-butyl acrylate)/nano-titanium oxide composite particles.
abstract: Poly(methyl methacrylate-butyl acrylate) [P(MMA-BA)]/nanosized titanium oxide (nano-TiO2) composite particles were prepared via insitu emulsion polymerization of MMA and BA in presence of nano-TiO2 particles. Before polymerization, the nano-TiO2 particles were modified by coupling agent. The structure and thermal properties of the obtained P(MMA-BA)/nano-TiO2 composite particles were characterized by Fourier transform infrared spectra (FTIR), wide-angle X-ray diffraction (WAXD) and thermogravimetric analysis (TGA). The results showed that there are covalent bond bindings between P(MMA-BA) and nano-TiO2 particles, meaning that P(MMA-BA) and nano-TiO2 particles were not simply blended or mixed up and that there is a strong interaction between P(MMA-BA) and nano-TiO2 particles. TGA and DSC measurements indicated an enhancement of thermal stability. Transmission electron microscopy (TEM) results showed that P(MMA-BA) enhanced the dispersibility of nano-TiO2 particles. The dispersion stabilization of modified nano-TiO2 particles in aqueous system was significantly improved due to the introduction of grafted polymer on the surface of nano-particles.
authors.affiliation: State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Guo
authors.forename: Jie
authors.initials: J
authors.lastname: Yu
authors.forename: Zhu
authors.initials: Z
authors.lastname: Luo
authors.forename: LiangXue
authors.initials: L
authors.lastname: Zhou
authors.forename: Hang
authors.initials: H
authors.lastname: Liang
authors.forename: Feng
authors.initials: F
authors.lastname: Luo
authors.forename: ZhiYong
authors.initials: Z
authors.lastname: Qian
mesh_terms: D002152:Calorimetry, Differential Scanning; D008768:Methylmethacrylates / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D058105:Polymerization; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D014025:Titanium / Q000737:chemistry*
chemical_list: D008768:Methylmethacrylates; C506478:poly(methyl methacrylate-co-(n-butyl acrylate)); C009495:titanium dioxide; D014025:Titanium