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首页> 外文期刊>ACS Macro Letters >Direct Route to Well-Defined Poly(ionic liquid)s by Controlled Radical Polymerization in Water
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Direct Route to Well-Defined Poly(ionic liquid)s by Controlled Radical Polymerization in Water

机译:通过控制水中的自由基聚合直接生成定义良好的聚离子液体

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摘要

The precision synthesis of poly(ionic liquid)s (PILs) in water is achieved for the first time by the cobalt-mediated radical polymerization (CMRP) of N-vinyl-3-alkylimidazolium-type monomers following two distinct protocols. The first involves the CMRP of various 1-vinyl-3-alkylimidazolium bromides conducted in water in the presence of an alkyl cobalt(III) complex acting as a monocomponent initiator and mediating agent. Excellent control over molar mass and dispersity is achieved at 30 degrees C. Polymerizations are complete in a few hours, and PIL chain-end fidelity is demonstrated up to high monomer conversions. The second route uses the commercially available bis(acetylacetonato)cobalt(II) (Co(acac)2) in conjunction with a simple hydroperoxide initiator (tertbutyl hydroperoxide) at 30, 40, and 50 degrees C in water, facilitating the scaling-up of the technology. Both routes prove robust and straightforward, opening new perspectives onto the tailored synthesis of PILs under mild experimental conditions in water.
机译:遵循两个不同的方案,通过N-乙烯基-3-烷基咪唑鎓型单体的钴介导的自由基聚合(CMRP),首次实现了水中聚离子液体(PIL)的精确合成。首先涉及在作为单组分引发剂和介导剂的烷基钴(III)配合物的存在下,在水中进行的各种1-乙烯基-3-烷基咪唑鎓溴化物的CMRP。在30摄氏度下实现了对摩尔质量和分散度的出色控制。聚合反应在数小时内完成,PIL链端保真度被证明可达到高单体转化率。第二种方法是在30、40和50摄氏度的水中,使用市售的双(乙酰​​丙酮基)钴(II)(Co(acac)2)与简单的氢过氧化物引发剂(氢过氧化叔丁基),以促进放大技术。两种途径都证明是稳健而直接的,这在温和的实验条件下在水中为定制的PIL合成开辟了新的视角。

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