分散性
链式转移
木筏
可逆加成-断裂链转移聚合
共聚物
聚合物
聚合
材料科学
甲基丙烯酸
单体
自由基聚合
摩尔质量分布
甲基丙烯酸酯
醋酸乙烯酯
甲基丙烯酸甲酯
苯乙烯
高分子化学
活性聚合
化学工程
复合材料
工程类
作者
Richard Whitfield,Kostas Parkatzidis,Nghia P. Truong,Tanja Junkers,Athina Anastasaki
出处
期刊:Chem
[Elsevier]
日期:2020-06-01
卷期号:6 (6): 1340-1352
被引量:127
标识
DOI:10.1016/j.chempr.2020.04.020
摘要
Summary
Dispersity (Ɖ) can significantly affect polymer properties and is a key parameter in materials design. Here, we report a straightforward and versatile batch method based on reversible addition-fragmentation chain transfer (RAFT) polymerization to tailor the molecular weight distributions for a wide range of monomer classes, including acrylates, acrylamides, methacrylates, and styrene. In addition, our methodology is compatible with more challenging monomers, such as methacrylic acid, methyl vinyl ketone, and vinyl acetate. Control over Ɖ is achieved by mixing two RAFT agents with sufficiently different chain-transfer activities in various ratios, affording polymers with monomodal molecular weight distributions over a broad dispersity range (Ɖ ∼ 1.09–2.10). Our experimental findings were supported by simulations through the use of deterministic kinetic modeling, and our method was further demonstrated for the preparation of well-defined block co-polymers, regardless of the initial homopolymer dispersity.
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