Sequence Features of Sequence-Controlled Polymers Synthesized by 1,1-Diphenylethylene Derivatives with Similar Reactivity during Living Anionic Polymerization
Sequence Features of Sequence-Controlled Polymers Synthesized by 1,1-Diphenylethylene Derivatives with Similar Reactivity during Living Anionic Polymerization
复制标题
具有相似反应活性的1,1-二苯乙烯衍生物在活性阴离子聚合过程中合成的序列控制聚合物的序列特征
DOI：
10.1021/acs.macromol.8b01491
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发表时间：
2018-08-14
期刊：
影响因子：
5.5
通讯作者：
Li, Yang
中科院分区：
文献类型：
--
作者：
Yang, Lincan;Ma, Hongwei;Li, Yang
活性阴离子聚合（LAP）是活性聚合的主要代表性方法，具有合成序列调节的功能化聚合物的能力。然而，LAP 一直缺乏特殊功能来指导序列控制聚合物的这些尖端合成。在这项研究中，一系列具有相似反应活性但结构不同的烷基取代的1,1-二苯基乙烯衍生物（DPE-烷基）与St进行了共聚。此外，通过原位1H NMR方法监测了整个链增长的过程。结果表明，改变DPE-烷基的烷基类型对其共聚过程中的序列分布影响很小。因此，我们可以在LAP中推导出一个合理的原理，称为“序列等效”：当DPE衍生物在共聚过程中表现出完全相同的反应活性比（rSt）时，不同DPE衍生物与St的共聚物将具有相同的序列结构。
Living anionic polymerization (LAP) is the primary representative method of living polymerization and exhibits the ability to synthesize sequence-regulated functionalized polymers. However, there has always been a lack of special features for LAP to guide these cutting-edge syntheses in sequence-controlled polymers. In this study, the copolymerizations of a series of alkyl-substituted 1,1-diphenylethylene derivatives (DPE-alkyls), which display similar reactivities but different structures, and St were performed. In addition, the processes of whole chain propagation were monitored by the in situ 1H NMR method. The results show that changing the alkyl type of DPE-alkyls has little influence on their sequence distributions during copolymerization. Therefore, we could deduce a reasonable principle called “sequence equivalence” in LAP: the copolymers of different DPE derivatives and St would have identical sequence structures when DPE derivatives exhibit exactly the same reactivity ratio (rSt) during the copo...