Simple polymerization through oxygen at reduced volumes using oil and water
Simple polymerization through oxygen at reduced volumes using oil and water
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DOI：
10.1002/pol.20210386
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发表时间：
2021-06-21
影响因子：
3.4
通讯作者：
Konkolewicz, Dominik
中科院分区：
文献类型：
--
作者：
Burridge, Kevin M.;Watuthanthrige, Nethmi De Alwis;Konkolewicz, Dominik
一个经久不衰的问题是：获得定制聚合物的最简单和最容易的方法是什么？本文探讨了一种强大的光干扰聚合，只有两种活性成分，不需要事先脱氧，可以在毫升规模或亚毫升规模上进行。这种方法不是在聚合容器中留下顶空，也不是扩大反应规模来填充容器，而是用矿物油或惰性溶剂填充反应容器的顶空。这种方法也可以应用于水介质中的极性单体，以油为惰性溶剂，或以水为惰性溶剂的疏水单体。该方法去除足够的环境氧，使光干扰素反应无需脱氧步骤即可进行，在水溶剂和有机溶剂中均可在10-20 h内实现高转化率和良好的分子量控制。该方法成功地合成了多嵌段共聚物和梯度聚合物等复杂聚合物结构。
An enduring question is: what is the simplest and easiest way to obtain tailored polymers? This communication explores a robust photoiniferter polymerization with only two active ingredients that requires no prior deoxygenation and can be performed on the milliliter scale or sub-milliliter scale. Rather than leaving headspace in the polymerization vessel or scaling reactions up to fill the vessel, this approach fills the headspace of the reaction vessel with mineral oil or inert solvents. This approach can also be applied to polar monomers in aqueous media, using oil as the inert solvent, or to hydrophobic monomers with water as the inert solvent. This method removes enough ambient oxygen that the photoiniferter reaction proceeds with no deoxygenation step, and achieves high conversion and good molecular weight control in 10-20 h in both aqueous and organic solvents. Complex polymer architectures such as multiblock copolymers and gradient polymers were successfully synthesized by this approach.