Author: Yu Jie1,2 Liu Yang1 He Min1,2 Lu Shengjun*,1,2 Hu Zhi2 Luo Zhu1,2 (1 College of Materials Science and Metallurgical Engineering Gui Zhou University Guiyang 550003 2 National Endineering Research Center for Compounding and Polymeric Material Guiyang 550014)
Abstract: Silica Sol(Si Sols)was graft-modified by using hexamethyldisilazane(HMDS)under acidc condition.The graft product was characterized by TG and FT-IR.The influences of HMDS/Si Sols(mol ratio), reaction temperature and reaction time on the graft ratio of the product were discussed in detail.Results showed that the graft ratio could be reached a maximum when controlling HMDS/Si Sols(mol ratio)of 0.5 in 35℃after 2h in an acidic catalytic condition. 
Key words: Silica Sol(Si Sols)； Hexamethyldisilazane(HMDS)； Graft modification； Graft ratio；