硫脲
聚合
双功能
化学
单体
高分子化学
开环聚合
尿素
有机化学
共聚物
聚合物
催化作用
组合化学
标识
DOI:10.1016/j.eurpolymj.2020.109791
摘要
Hydrogen bond-mediated organocatalysis has emerged as a very powerful strategy for the synthesis of structurally well-defined polymers. Urea and thiourea derivatives are among one of the extensively explored hydrogen-bonding organocatalysts for ringopening polymerization. These catalytic systems have potential to exquisitely control the activity and selectivity of the polymerization processes, the field has witnessed astonishing development in recent years. This review documents advances in the field of urea and thiourea catalyzed ring-opening polymerization since their debut in 2005, with an emphasis on seminal work of Hedrick and Waymouth groups. The first part of the review discusses one component bifunctional urea and thiourea catalyzed ring-opening polymerization of cyclic monomers and in the second part newly developed two component bifunctional urea and thiourea catalysts are described. The third part provides an overview of dual urea and thiourea-base catalyzed ringopening polymerization and copolymerization of cyclic monomers such as esters, carbonates, phosphates, anhydrides and epoxides. The final part is concluded by highlighting the challenges and future opportunities for urea and thiourea systems in polymer synthesis.
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