Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 39, Issue 24, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201800485
Keywords
organocatalysts; phosphazene bases; polyesters; ring-opening polymerization
Categories
Funding
- NSFC [21434008, 21404123, 21704049]
- Major Program of Shandong Province Natural Science Foundation [ZR2017ZB0105]
- Natural Science Foundation of Shandong Province [ZR2018JL007]
- Taishan Scholars Program [tsqn20161031]
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Over the past several years, organocatalyzed polymerization reactions have attracted considerable attention, and these efforts have led to major advances. A large number of organic compounds have been proven active for the polymerization of a large variety of monomers. In particular, phosphazene bases (PBs) are a family of extremely strong, non-nucleophilic, and uncharged auxiliary bases, and have shown their remarkable potential as organocatalysts for the ring-opening polymerization (ROP) of cyclic monomers. By deprotonation of weak acids or in combination with lithium cation, PBs significantly enhance the nucleophilicity of the initiator/chain-end, thus allowing fast and usually controlled anionic polymerization. In this feature article, the recent advances in phosphazene-catalyzed ROP of cyclic esters are summarized. This review is divided into three sections, including general features, design and synthesis, and catalytic applications. It aims to provide a critical analysis of PB-mediated ROP systems and a useful guide for the further design of organocatalysts applied to polymer synthesis. An outlook is given at the end.
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