The anchoring of the photoinitiator and the photo-grafting polymerization of mma on the surface of nanometer silica particles

被引：0
|
作者：
Liu Xiaoxuan [1 ]
Bai Yingkun
Jing Yanni
Wang Hongbo
Chen Bing
Wu Guangguo
机构：
[1] Guangdong Univ Technol, Coll Mat & Energy, Dept Polymer Mat & Engn, Guangzhou 510006, Peoples R China
[2] Shantou Univ, Coll Sci, Dept Chem, Shantou 515063, Peoples R China
来源：
ACTA POLYMERICA SINICA | 2007年 / 11期
关键词：
photoinitiator; surface modification of nanometer silica; MMA; photo-grafting polymerization; thermostability;
D O I：
暂无
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The anchoring of the photoinitiator and the photo-grafting polymerization of methyl methacrylate (MMA) on the surface of nanometer silica particles have been performed. The anchoring of the initiator on the silica was achieved by treating silica with thionyl chloride and reacting with Irgacure2959. Poly(methyl methacrylate) (PMMA) has effectively grafting on the surface of the nanometer silica particles during the photo-grafting polymerization initiated by Irgacure2959. The change of particle surface and the grafting of PMMA polymers were confirmed by IR, TGA and TEM technique. Monomer conversion, grafting ratio and grafting efficiency under various conditions were investigated. It is shown that grafting reaction with stirring has a prominent effect on the grafting ratio and the grafting efficiency during the photo-grafting polymerization. The grafting ratio of MMA could be up to 110% initiated by Silica-2959 with stirring in the presence of nitrogen, and the thermostability of the products measured by TGA would be remarkably improved. However the grafting ratio can only reach a less degree in a static state (no stirring) during the process.
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页码：1057 / 1063
页数：7
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