解聚
链式转移
可逆加成-断裂链转移聚合
聚合
高分子化学
甲基丙烯酸缩水甘油酯
聚合物
单体
自由基聚合
甲基丙烯酸甲酯
材料科学
木筏
化学
有机化学
作者
Hyun Suk Wang,Nghia P. Truong,Glen R. Jones,Athina Anastasaki
出处
期刊:ACS Macro Letters
[American Chemical Society]
日期:2022-09-29
卷期号:11 (10): 1212-1216
被引量:21
标识
DOI:10.1021/acsmacrolett.2c00506
摘要
Reversing reversible deactivation radical polymerization (RDRP) to regenerate the original monomer is an attractive prospect for both fundamental research and industry. However, current depolymerization strategies are often applied to highly heat-tolerant polymers with a specific end-group and can only be performed in a specific solvent. Herein, we depolymerize a variety of poly(methyl methacrylate) materials made by reversible addition-fragmentation chain-transfer (RAFT) polymerization and terminated by various end groups (dithiobenzoate, trithiocarbonate, and pyrazole carbodithioate). The effect of the nature of the solvent on the depolymerization conversion was also investigated, and key solvents such as dioxane, xylene, toluene, and dimethylformamide were shown to facilitate efficient depolymerization reactions. Notably, our approach could selectively regenerate pure heat-sensitive monomers (e.g., tert-butyl methacrylate and glycidyl methacrylate) in the absence of previously reported side reactions. This work pushes the boundaries of reversing RAFT polymerization and considerably expands the chemical toolbox for recovering starting materials under relatively mild conditions.
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