School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China.
School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, 450001, China.
Macromol Rapid Commun. 2023 Jul;44(14):e2300028. doi: 10.1002/marc.202300028. Epub 2023 Jun 4.
Reversible deactivation radical polymerization (RDRP) is a facile and highly efficient technique for the synthesis of well-defined polymer with precise structure. dl-Methionine (Met) as a RDRP control agent is described and assessed for RDRP of styrene (St) and methyl methacrylate (MMA) with AIBN as radical initiator at 75 °C, which enables excellent control of this polymerization. The addition of dl-Methionine significantly decreased the dispersity (Đ) of the polymers for both monomers and first-order linear kinetic plots of polymethyl methacrylate (PMMA) are observed in DMSO. Considering the heat resistance of dl-Methionine, kinetic studies indicate that polymerization develops at a faster rate at higher reaction temperature (100 °C) with the same dl-Methionine content. Well-defined polymethyl methacrylate-block-polystyrene (PMMA-block-PSt) is successfully achieved by the chain extension reaction that demonstrates the high end fidelities of this polymerization approach. The system allows the use of dl-Methionine, a rich source and easily synthesized agent, to mediate RDRP strategy.
可逆失活自由基聚合（RDRP）是一种简便高效的技术，可用于合成具有精确结构的聚合物。dl-蛋氨酸（Met）作为 RDRP 控制剂，用于苯乙烯（St）和甲基丙烯酸甲酯（MMA）的 RDRP，以 AIBN 作为自由基引发剂，在 75°C 下进行，可对该聚合进行极好的控制。dl-蛋氨酸的加入显著降低了两种单体聚合物的分散度（Đ），并且在 DMSO 中观察到聚甲基丙烯酸甲酯（PMMA）的一级线性动力学图。考虑到 dl-蛋氨酸的耐热性，动力学研究表明，在相同的 dl-蛋氨酸含量下，聚合在较高的反应温度（100°C）下以更快的速率进行。通过链延伸反应成功地实现了具有良好定义的聚甲基丙烯酸甲酯-嵌段-聚苯乙烯（PMMA-b-PSt），这证明了该聚合方法具有很高的末端保真度。该体系允许使用 dl-蛋氨酸，一种丰富的、易于合成的试剂，来介导 RDRP 策略。
