| 초록 |
To prepare thermally expandable core-shell microspheres, using SPG membrane emulsification and suspension polymerization. The copolymer shells consist of acrylonitrile(AN) and methyl methacrylare(MMA). With aiming to prepare microcapsules having a particle size of 30-50 µm, colloidal silica and poly(vinylpyrrolidone)(PVP) were used as the inorganic Pickering emulsifier and the organic stabilizer, respectively. And core material is iso-octane used as blowing agents. Suspension polymerization after emulsification of the SPG membrane was carried out to produce uniform particles as compared with the suspension polymerization. Characterization is used by SEM, TGA, Coulter. |
