反应性二氧化硅／聚甲基丙烯酸甲酯复合微粒子的合成  

Synthesis of Reactive Silica/polymethyl Methacrylate Composite Particles

作　　者：李俊[1] 王重辉[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《中国材料科技与设备》2006年第6期36-38,共3页Chinese Materials Science Technology & Equipment

基　　金：日本伯东株式会社委托研究项目

摘　　要：在有效的表面活性剂的存在下，经乙烯基三乙氧基硅烷处理过的SiO2水性分散液中，进行甲基丙烯酸甲酯乳液聚合，在反应末期加入终止剂4-羟基-2，2，6，6-四甲基氧化哌啶醇（HTEMPO），使高分子末端生成具有HTEMPO残基结构的无机／有机复合微粒子。该微粒子具有核-壳结构，SiO2表面包覆的长链高分子可直接与树脂分子缠绕，能提高复合材料的力学性能。该复合微粒子在较高温度下可发生HTEMPO-聚合物结构的解离，生成活性自由基聚合物链，因而能够与特定官能团进行反应，实现复合微粒子的功能化。In an aqueous suspension of SiO2 modified with vinyl triethoxysilane silane agent, the emulsion polymerization of methyl methacrylate was carried out in presence of effective surfactant. At the end of the polymerization, 4 - hydroxy - 2, 2, 6, 6 - tetra methyl piperidine - N - oxyl （HTEMPO） was added as radical scavenger, and the inorganic/organic composite particles with HTEMPO terminal residues was obtained. The particles have core - shell structure, and the polymer chains on the surface of SiO2 can blend with other polymer in order to improve the mechanics properties of composite materials. The polymer - HTEMPO terminal residues can be dissociated into the living free radical polymer chains under the higher temperature, and consequently could react with special groups as a result of functions of composite particles.

关 键 词：反应性复合微粒子 自由基捕捉剂 核-壳结构 HTEMPO末端残基 

分 类 号：TB324[一般工业技术—材料科学与工程]