负载型CuCl催化剂的制备及其在原子转移自由基聚合中的应用  

Synthesis & Application of CuCl-supported Catalyst to Atom Transfer Radical Polymerization

作　　者：曹勇[1] 谷崇 刘利慧[1] 李微雪[1] 李敬远[1] 雷良才[1] 李海英[1] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,抚顺113001

出　　处：《材料导报》2015年第6期40-44,共5页Materials Reports

基　　金：国家自然科学基金(20974042)

摘　　要：在正丁基锂催化下,通过亲核取代反应将2,2′-联吡啶键连在氯球(PS-Cl,氯甲基化交联聚苯乙烯微球)表面,进而络合CuCl得到负载型催化剂PS-bpy/CuCl。将该负载型催化剂用于甲基丙烯酸甲酯(MMA)、丙烯酸甲酯(MA)或苯乙烯(Sty)等单体的原子转移自由基聚合反应(ATRP),并对聚合反应动力学规律进行了考察。实验结果表明,负载型催化剂PS-bpy/CuCl参与的聚合反应满足一级动力学反应规律,属活性/可控聚合,产物的分子量分布较窄(1.20),产物中铜的含量为0.094mg/g。负载型催化剂PS-bpy/CuCl可以通过简单过滤进行分离回收,活化后仍具有良好的活性,可重复应用。2,2′-dipyridyl（bpy）was grafted onto the surface of chloromethalated-crosslinking-polystyrene-microsphere（PS-Cl）by nucleophilic substitution reaction.Then supported catalysts PS-bpy/CuCl were prepared via the metalation of PS-bpy with CuCl.The catalysts were employed in the atom transfer radical polymerization of vinyl monomers,such as methyl methacrylate,methacrylate or styrene.The research results indicated that the polymerizations catalyzed by PS-bpy/CuCl obeyed the first order reaction kinetics,with a relative molecular mass distribution of 1.20.It was confirmed by the inductively coupled plasma（ICP）analysis that the residual amount of Cu in the resulting polymer was 0.094mg/g.The supported catalyst PS-bpy/CuCl could be easily separated from final product and recycled.

关 键 词：原子转移自由基聚合反应 负载型催化剂 亲核取代 甲基丙烯酸甲酯 

分 类 号：O631.5[理学—高分子化学]