乙酸乙烯酯的单电子转移活性自由基聚合  

Single-Electron Transfer Living Radical Polymerization of Vinyl Acetate

作　　者：陈冲[1] 任伍杨[1] 江龙[1] 淡宜[1] 

机构地区：[1]高分子材料工程国家重点实验室(四川大学),四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2013年第1期44-47,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20374036);高分子材料工程国家重点实验室自主规划项目资助

摘　　要：采用SET-LRP方法进行了乙酸乙烯酯(VAc)的活性聚合。通过聚合转化率、聚合物相对平均分子量及分子量分布、聚合物核磁共振氢谱分析,研究了额外失活剂(CuCl2)、温度、溶剂等因素对聚合反应的影响。研究结果表明,失活剂CuII在使反应可控性得到增加的同时却降低了反应的转化率;反应速率不会随反应温度的升高持续增加,超过某一临界温度后反应速率反而随温度的升高而降低;与二甲基亚砜(DMSO)为溶剂相比,甲醇(CH3OH)为溶剂时,得到的聚合物的相对平均分子量较高,但分子量分布较宽。In the present study, single-electron transfer living radical polymerization （SET-LRP） is applied to the controlled polymerization of vinyl acetate （VAt） . The effects of additional deactivator, temperature and solvent on the polymerization reaction were studied by analyzing the conversion, the relative average molecular weight and its distribution, 1H-NMR. The results shows that with the addition of deactivator Cu11 X2, the controllability of polymerization gets improved remarkably, while the conversion rate of the reaction reduces. The polymerization has a optimal reaction temperature. Using methanol as solvent, the obtained polymer has the higher relative average molecular weight and the wider molecular weight distribution, compared with the corresponding results using dimethyl sulfoxide （DMSO） as solvent.

关 键 词：单电子转移活性自由基聚合 乙酸乙烯酯 失活剂 温度 溶剂 

分 类 号：TQ316.322[化学工程—高聚物工业]