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首页> 外文期刊>Journal of Applied Polymer Science >Atom transfer radical polymerization of n-butyl methacrylate in an aqueous dispersed system
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Atom transfer radical polymerization of n-butyl methacrylate in an aqueous dispersed system

机译：水性分散体系中甲基丙烯酸正丁酯的原子转移自由基聚合

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Atom transfer radical polymerization of n-butyl methacrylate (BMA) was conducted in an aqueous dispersed system with different kinds of copper complexes. The partitioning behavior of the copper complexes, including CuCl/4,4'-di(5-nonyl)-2,2'-bipydine (dNbpy), CuCl2/dNbpy, CuCl/2,2'-bipydine (bpy), CuCl2/bpy, CuCl/bis(N,N'-dimethylaminoethyl)ether (bde), and CuCl2/bde between the monomer (BMA), and water was studied in detail with ultraviolet-visible spectroscopy. The results show that with a less hydrophobic ligand, such as bpy or bde, most of the Cu(I) or the Cu(II) complexes migrated from the BMA phase to the aqueous phase, the atom transfer equilibrium was destroyed, and the polymerization was nearly not controlled; it converted to classical emulsion polymerization. As to the very hydrophobic ligand dNbpy, although the partitioning study of the copper complexes indicated that not all the copper species were restricted to the organic phase, the linear correlation between the molecular weight and the monomer conversion and the narrow polydispersities confirmed that the polymerization was still quite well controlled. (C) 2003 Wiley Periodicals, Inc. [References: 23]
机译：甲基丙烯酸正丁酯（BMA）的原子转移自由基聚合是在具有不同种类铜配合物的水分散体系中进行的。包括CuCl / 4,4'-二（5-壬基）-2,2'-联吡啶（dNbpy），CuCl2 / dNbpy，CuCl / 2,2'-联吡啶（bpy），CuCl2的铜络合物的分配行为用紫外可见光谱详细研究了/ bpy，CuCl /双（N，N'-二甲基氨基乙基）醚（bde）和单体（BMA）与水之间的CuCl2 / bde。结果表明，使用疏水性较低的配体（例如bpy或bde），大多数Cu（I）或Cu（II）配合物从BMA相迁移至水相，破坏了原子转移平衡，并且聚合几乎不受控制;它转化为经典的乳液聚合。对于非常疏水的配体dNbpy，尽管对铜络合物的分配研究表明并非所有的铜都限于有机相，但分子量与单体转化率之间的线性关系以及窄的多分散性证实聚合是仍然控制得很好。 （C）2003 Wiley Periodicals，Inc. [参考：23]

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