Synthesis of poly(2-hydroxyethyl methacrylate) in protic media through atom transfer radical polymerization using activators generated by electron transfer
Synthesis of poly(2-hydroxyethyl methacrylate) in protic media through atom transfer radical polymerization using activators generated by electron transfer
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DOI：
10.1002/pola.21482
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发表时间：
2006-06-15
影响因子：
--
通讯作者：
Matyjaszewski, Krzysztof
中科院分区：
文献类型：
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作者：
Oh, Jung Kwon;Matyjaszewski, Krzysztof
以甲基乙基酮和甲醇的体积比为3：2的质子溶剂为溶剂，采用电子转移活化剂（AGET）进行甲基丙烯酸羟乙酯（HEMA）的原子转移自由基聚合（ATRP）。AGET过程使ATRP开始与空气稳定的Cu（II）络合物，原位减少锡（II）2-乙基己酸。研究了反应温度、不同配体的Cu催化剂以及HEMA与引发剂初始浓度比的变化对合成可控的聚甲基丙烯酸2-羟乙酯和聚甲基丙烯酸甲酯-b-聚甲基丙烯酸2-羟乙酯嵌段共聚物的影响。AGET ATRP中的对照水平与质子溶剂中的正常ATRP中的对照水平相似，并且这导致分子量随转化率线性增加和窄的分子量分布（重均分子量/数均分子量< 1.3）。(c)2006 Wiley Periodicals，Inc.
Atom transfer radical polymerization (ATRP) using activators generated by electron transfer (AGET) was investigated for the controlled polymerization of 2-hydroxyethyl methacrylate (HEMA) in a protic solvent, a 3/2 (v/v) mixture of methyl ethyl ketone and methanol. The AGET process enabled ATRP to be started with an air-stable Cu(II) complex that was reduced in situ by tin(II) 2-ethylhexanoate. The reaction temperature, Cu catalysts with different ligands, and variation of the initial concentration ratio of HEMA to the initiator were examined for the synthesis of well-controlled poly(2-hydroxyethyl methacrylate) and a poly(methyl methacrylate)-b-poly(2-hydroxyethyl methacrylate) block copolymer. The level of control in AGET ATRP was similar to that in normal ATRP in protic solvents, and this resulted in a linear increase in the molecular weight with the conversion and a narrow molecular weight distribution (weight-average molecular weight/number-average molecular weight < 1.3). (c) 2006 Wiley Periodicals, Inc.