Emulsion copolymerization of styrene and butyl acrylate by reverse atom transfer radical polymerization
Emulsion copolymerization of styrene and butyl acrylate by reverse atom transfer radical polymerization
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DOI：
10.1002/app.36947
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发表时间：
2012-11
影响因子：
3
通讯作者：
Yumin Wu;G. Dong;Jun Xu;Guangdi Ni
中科院分区：
文献类型：
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作者：
Yumin Wu;G. Dong;Jun Xu;Guangdi Ni
在常规乳液条件下，以CuBr2/bpy络合物为催化剂，在乳液中进行了苯乙烯(St)与丙烯酸丁酯的反原子转移自由基共聚合。考察了表面活性剂种类、引发剂种类和浓度以及CuBr2加入量对体系活性、聚合物相对分子质量控制和乳液稳定性的影响。结果表明，聚山梨酸酯80(吐温80)和偶氮二异丁腈在该体系中表现最好，得到的聚合物样品具有窄的分子量分散性(Mw/mN=1.1~1.2)和分子量与单体转化率的线性关系，以及较低的多分散指数(<；0.1)。通过凝胶渗透色谱(GPC)和扫描电子显微镜(SEM)分析，尽管CuBr2催化剂对胶乳稳定性敏感，但与常规乳液聚合相比，该条件下的聚合过程表现出良好的活性/控制性。2012 Wiley期刊，Inc.《应用波利姆科学》，2012
Reverse atom transfer radical copolymerization of styrene (St) and butyl acrylate was carried out in emulsion under normal emulsion conditions, using CuBr2/bpy complex as catalyst. The effects of surfactant type, initiator type and concentration, and CuBr2 addition on the system livingness, polymer molecular weight control, and latex stability were examined in detail. It was found that the Polysorbate 80 (Tween 80) and azodiisobutyronitrile gave the best exhibition in this system, polymer samples were got with narrow molecular-weight dispersity (Mw/Mn = 1.1–1.2) and linear relationships of molecular weight versus monomer conversion, as well as a relatively low polydispersity index (<0.1). Through the GPC and SEM analysis, the polymerization processes under these conditions showed good living/control characteristics relative to the processes under normal emulsion polymerization, although the latex stability was susceptible to the CuBr2 catalyst. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012