Title :
Synthesis and characterisation of polymethylmethacrylate/nanosilica and nanosilica/ polymethylmethacrylate core-shell structure composite microspheres
Author :
Tao Lin ; Yuying Zheng
Author_Institution :
Coll. of Chem. & Chem. Eng., Fuzhou Univ., Fuzhou, China
Abstract :
The nanosilica/polymethylmethacrylate (SiO2/PMMA) and polymethylmethacrylate/nanosilica (PMMA/SiO2) core-shell structure composite microspheres were fabricated by dispersion polymerisation under similar reaction conditions. These two kinds of microspheres are different to each other by their opposite core-shell structure. The composite mircospheres were characterised by infrared spectra, transmission electron microscopy and thermal gravimetric analysis (TGA). The diameter of SiO2/PMMA particles is about 50 nm. The average diameters of PMMA/SiO2 particles are in the range of 60-70 nm as KH570 was added after methyl methacrylate polymerisation reaction for 2 h. The TGA curves show that the thermal stability of SiO2/PMMA is better than PMMA/SiO2.
Keywords :
filled polymers; infrared spectra; nanocomposites; nanofabrication; nanoparticles; particle size; polymerisation; silicon compounds; thermal analysis; thermal stability; transmission electron microscopy; SiO2; SiO2-PMMA fabrication; TGA curves; dispersion polymerisation; infrared spectra; methyl methacrylate polymerisation reaction; nanosilica-polymethylmethacrylate core-shell structure composite microspheres; particle diameter; polymethylmethacrylate-nanosilica synthesis; thermal gravimetric analysis; thermal stability; time 2 h; transmission electron microscopy;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2012.0813
