| 摘要 |
<p>The invention concerns a porous polymethylsilsesquioxane (PMS) having a specific surface area ranging between about 50 and 500 m2/g, a porous volume ranging between about 0.1 and 0.8 cm3/g, a monolayer volume ranging between about 10 and 60 cm3/g, a pore radius less than 1 mn of 90 % of the pores and insoluble in water and organic solvents. The inventive PMS is prepared by precipitating a polymethylsiliconate of general formula (I) wherein n is an integer between about 20 and 100 and M is an alkaline or alkaline-earth metal or NH¿4?+.</p> |
