几种新型有机酸配体和FeCl_2络合催化下的苯乙烯原子转移自由基聚合反应

New Ligands for Fe(II)-Mediated Atom Transfer Radical Polymerization of Styrene

以FeCl2 为催化剂 ,选用不同有机酸作为配体 ,用不同引发剂 (苄氯 ,对硝基溴化苄 ,四氯化碳等 )催化引发了苯乙烯的原子转移自由基聚合反应 (AtomTransferRadicalPolymerization简称ATRP) ,获得了可控聚合产物 (相对分子质量分布 1.1～ 1.5 ) ,所得聚合物的相对分子质量随转化率的增加而增加 .结果表明 ,FeCl2 /二苯乙醇酸和FeCl2

The atom transfer radical polymerization(ATRP) of styrene(St) catalyzed by new ligands/FeCl_2 with different initiators (benzyl chloride, α-bromo-4-nitrotoluene, tetrachloro-methane etc.) was performed. Well-defined polymer with low polydispersity (1.1<M_w/M_n<1.5) was obtained. The number-average molecular of polymers increases linearly with monomer conversion. The results show that FeCl_2/benzeneacetic acid and FeCl_2/butanedioic acid are particularly effective catalyst system for ATRP of styrene.