共聚物
高分子化学
聚合
化学
单体
反应性(心理学)
衍生工具(金融)
序列(生物学)
动力学
戒指(化学)
聚合物
阴离子加成聚合
有机化学
经济
病理
物理
金融经济学
替代医学
医学
量子力学
生物化学
作者
Hongyuan Bai,Li Han,Chao Li,Songbo Zhang,Xuefei Wang,Yu Yin,Xiaolu Zhang,Hongwei Ma
出处
期刊:Macromolecules
[American Chemical Society]
日期:2021-07-26
卷期号:54 (15): 7269-7281
被引量:5
标识
DOI:10.1021/acs.macromol.1c00814
摘要
As a kind of well-defined monomer sequence distribution, an alternating sequence endows polymers with specific properties owing to the precisely repeating structure. In this study, we report a novel alternating copolymerization of 1,1-diphenylethylene (DPE) derivatives with 1-cyclopropylvinylbenzene (CPVB) by means of alternating transformation of anion-migrated ring-opening polymerization (AMROP for CPVB) and general anionic polymerization (AP for DPE derivatives) mechanisms. In particular, the kinetics of the elementary reaction in this copolymerization system were first investigated, and it was confirmed that alternating copolymerization with the ideal alternating copolymerization kinetics (kCD, kDC > 0; kDD, kCC = 0; thus, rC = rD = 0 at 20 °C) was achieved. Additionally, neither the lower reactivity of the DPE derivative nor the excess feeding of CPVB in the reaction substantially influenced the formation of alternating sequences. Furthermore, because the DPE derivatives (DPE, 1-[4-[N,N-bis(trimethylsilyl) amino]phenyl]-1-phenylethylene (DPE-NSi2) and 1-(4-dimethylaminophenyl)-1-phenylethylene (DPE-NMe2)) exhibited different reactivities, the sequence distributions of DPE and DPE derivative units in the chain can be regulated through terpolymerization with CPVB. Therefore, DPE units with random, gradient, and block distributions in alternating terpolymers, which cannot be achieved in general polymerization reactions because of kinetic limitations, can be well regulated based on the abovementioned alternating copolymerization system. Overall, this study inspires and promotes alternating copolymerization in the field of polymer chemistry.
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