| 摘要 |
PURPOSE:To form coating films of an org. polymer on the separate surfaces of inorg. particles by adding a quat. alkylammonium salt and potassium or ammonium persulfate to a suspension of the inorg. powder and further adding a vinyl monomer. CONSTITUTION:Inorg. powder is put in an aq. medium to prepare a suspension and an about 6-18C long chain quat. alkylammonium salt and potassium or ammonium persulfate are added to the suspension in about 1:2-1:4 molar ratio to deposit a slightly soluble double salt such as di(cetyltrimethylammonium) persulfate acting as a polymn. initiator on the surface of the powder. A vinyl monomer such as styrene is then added to the suspension and polymerized to coat the surface of the powder with a polymer such as polystyrene. Silica or metal oxide powder or glass beads of about 1mum-10mm diameter may be used as the inorg. powder. By this method, the surface of the inorg. powder can easily be coated with the polymer. |
