Lewis 酸存在下 N-羟乙基丙烯酰胺的原子转移自由基聚合：立构规整性、分子量和结构的控制。
ATRP of N-Hydroxyethyl Acrylamide in the Presence of Lewis Acids: Control of Tacticity, Molecular Weight, and Architecture.
机构信息
School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, China.
Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.
出版信息
Macromol Rapid Commun. 2019 May;40(10):e1800877. doi: 10.1002/marc.201800877. Epub 2019 Jan 16.
Good control of tacticity, molecular weight, and architecture is attained via atom transfer radical polymerization (ATRP) of N-hydroxyethyl acrylamide (HEAA), in a one-pot process in the presence of Y(OTf) . The effect of temperature, ratio of [Y(OTf) ]/[HEAA], and ATRP procedure on the tacticity and degree of control over the polymerization is investigated in detail. Under optimal conditions, using photo ATRP and 15% Y(OTf) the content of meso dyads (m) can be increased from 42% to 80% in a homopolymer with a dispersity D = 1.22. Well-defined stereoblock copolymers, atactic- b -isotactic poly(HEAA), with D = 1.27, are obtained by adding Y(OTf) at a specific conversion, initially started without Y(OTf) .
通过 N-羟乙基丙烯酰胺（HEAA）的原子转移自由基聚合（ATRP），在 Y（OTf）的存在下，一锅法反应可以很好地控制立构规整度、分子量和结构。详细研究了温度、[Y（OTf）] / [HEAA]的比例以及 ATRP 程序对聚合的立构规整度和控制程度的影响。在最佳条件下，使用光 ATRP 和 15%的 Y（OTf），可以将均聚物中（m）的含量从 42%增加到 80%，其分散度 D = 1.22。通过在特定转化率下添加 Y（OTf），最初不添加 Y（OTf）开始，可以得到无规- b-全同立构嵌段共聚物聚（HEAA），D = 1.27。
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