DPE对正丁基锂及聚苯乙烯活性种缔合体的影响  

Effect of DPE on Aggregation of n-Butyllithium and Polystyrene

作　　者：陈波[1] 王继铭[1] 束民泽 陈飞燕[1] 管涌[1] 郑安呐[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海先进聚合物材料重点实验室,超细材料制备与应用教育部重点实验室,上海200237

出　　处：《功能高分子学报》2014年第3期248-251,共4页Journal of Functional Polymers

基　　金：国家自然科学基金(5093302);国家"863"项目(2012AA040306);上海市重点学科建设项目(B502);超细材料制备与应用教育部重点实验室项目(08DZ2230500)

摘　　要：以具有较大空间位阻的1,1-二苯基乙烯(DPE)作为盖帽剂,使用核磁锂谱研究了正丁基锂(n-BuLi)经其盖帽以后缔合态的变化。结果表明:DPE的加入使n-BuLi中的超大缔合体解缔合成六元缔合体,但是不会影响原有的六元缔合体。由1,1-二苯基己基锂引发的苯乙烯本体聚合实验中存在转化率突变点。在突变点前的聚合产物中存在超分子结构,并随着聚合反应的进行逐渐解缔合;突变点过后超分子结构解缔合完全,反应加速进行。The effect of capping agent,1,1-diphenylethene（DPE）,on the aggregating state of n-butyllithium（n-BuLi）was studied using 7Li-NMR.Results showed that DPE would dissociate the big aggregators to hexamers in n-BuLi,while it could not further affect the hexamers.There was a changepoint in the conversion-time relationship of the bulk polymerization of styrene initiated by DPHLi,where existed supramolecules before the change-point.The supramolecules were dissociated during the polymerization.After the change-point,the supramolecules were dissociated completely,and the polymerization was proceeding faster.

关 键 词：1 1-二苯基乙烯 正丁基锂 缔合体 超分子 

分 类 号：O63[理学—高分子化学]