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电子活化再生原子转移自由基聚合(AGET ATRP)是近年来原子转移自由基聚合(ATRP)发展的一种新的合成方法。文中选用FeCl3.6H2O为催化剂,三苯基磷(PPh3)为配体,抗坏血酸(AsAc)为还原剂,溴化苄(BzBr)为引发剂,采用AGET ATRP法在110℃用本体聚合的方式成功合成了分子量可控的聚苯乙烯。结果表明,其本体聚合优于溶液聚合;在110℃时,n(St)/n(BzBr)/n(FeCl3.6H2O)/n(PPh3)/n(AsAc)=100/1/1/3/0.5时,聚苯乙烯的-Mn,GPC=6371,且分子量分布较窄(PDI=1.36)。聚合过程表现出“活性”/可控聚合的特征。
Electron-activated Regenerative Atom Transfer Radical Polymerization (AGET ATRP) is a new synthesis method for the development of atom transfer radical polymerization (ATRP) in recent years. In this paper, FeCl3.6H2O as catalyst, triphenylphosphine (PPh3) as ligand, ascorbic acid (AsAc) as reductant, benzyl bromide (BzBr) as initiator, using AGET ATRP method at 110 ℃ with bulk polymerization successfully Synthesis of molecular weight controllable polystyrene. The results showed that the bulk polymerization was better than that of solution polymerization. The molar ratio of n (St) / n (BzBr) / n (FeCl3.6H2O) / n (PPh3) / n (AsAc) = 100/1/1/3 / 0.5, the polystyrene-Mn, GPC = 6371, and the narrow molecular weight distribution (PDI = 1.36). The polymerization process shows “active” / controlled polymerization characteristics.