偶氮基团引发PMMA在纳米TiO_2表面接枝聚合研究  

Study on the Radical Grafting Polymerization of MMA Initiated by Azo Groups onto Nano-TiO_2 Surface

作　　者：王俊杰[1] 崔晶[1] 庄毅[1] 张玉梅[1] 王彪[1] 王华平[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海200051

出　　处：《功能高分子学报》2005年第2期279-284,共6页Journal of Functional Polymers

摘　　要：采用表面接枝反应的方法,在纳米TiO2上接枝偶联剂KH560,进而通过酯化反应引入偶氮基团引发甲基丙烯酸甲酯发生自由基聚合反应,并通过IR、SEM、TEM、DSC和TG等测试方法研究了反应条件对复合粒子结构和性能的影响。结果表明,反应约60min时,TiO2表面的接枝率达42.9%;当搅拌速率为1.0×104r/min时,TiO2均匀分散在PMMA基体中;TiO2粒子的加入使得PMMA的热稳定性有了明显提高。Radical grafting polymerization of MMA onto the nano-TiO_2 surface was investigated. The initiator azo group was obtained by esterification of the grafting product of the coupling agent KH-560 on the nano-TiO_2. The PMMA-g-TiO_2 was characterized by IR, SEM, TEM, DSC and TG etc. The results indicate that modified TiO_2 dispersed well in PMMA matrix when the rate is up to 1.0×104r/min and the grafting efficiency from the surface of TiO_2 reached 42.9%. In addition, the thermal stability of PMMA grafted TiO_2 was improved.

关 键 词：纳米TIO2 表面接枝 表面引发 自由基聚合 聚甲基丙烯酸甲酯 搅拌速率 

分 类 号：TB383[一般工业技术—材料科学与工程]