RAFT聚合制备PBMA/AA-SiO_2杂化纳米材料  

Preparation of PBMA/AA-SiO_2 nano hybrid material using RAFT polymerization

作　　者：王芳平[1] 张珺瑛[1] 李晚霞[1] 袁婷[1] 王其召[1] 俞洁[1] 杜新贞[1] 

机构地区：[1]甘肃省生物电化学与环境分析重点实验室,省部共建生态环境相关高分子材料教育部重点实验室,西北师范大学化学化工学院,甘肃兰州730070

出　　处：《化学研究与应用》2013年第8期1140-1143,共4页Chemical Research and Application

基　　金：国家自然科学基金资助项目(21065010;51262028);甘肃省自然科学基金资助项目(1208RJZA161)

摘　　要：以三硫代二[4-(甲氧羰基)苄基]碳酸酯为链转移剂(CTA),甲基丙烯酸丁酯(BMA)为单体,通过可逆加成-断裂链转移自由基聚合(RAFT)法修饰丙烯酸(AA)功能化的纳米二氧化硅(SiO2),制备了PBMA/AA-SiO2有机/无机杂化纳米材料。并通过FT-IR、GPC、TGA、TEM表征和分析了杂化材料的结构、分子量、SiO2纳米粒子在基体中的分散性以及杂化材料的热稳定性。结果表明,PBMA/AA-SiO2杂化微球粒径约为22 nm,分布均匀;TGA分析表明此杂化材料的热稳定性良好,PBMA接枝率为19%。With bis[4-（methoxycarbonyl）benzyl]trithiocarbonate（CTA）as a chain transfer agent,butyl methacrylate（BMA）as monomer,and functionalized silica modified by attaching AA group to the surface,PBMA/AA-SiO2 nano composite material was prepared using reversible addition-fragmentation chain transfer（RAFT）polymerization.The structures and properties of PBMA/AA-SiO2 were characterized by FT-IR,TGA,GPC and TEM.These results showed that PBMA/AA-SiO2 hybrid microspheres of 22 nm in average diameters were obtained.TGA results revealed that the thermal stability of the hybrid material was very well,and the grafting yield of PBMA on the SiO2 was 19%.

关 键 词：纳米二氧化硅 RAFT 杂化材料 BMA 

分 类 号：O631.5[理学—高分子化学]