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论文类型：期刊论文

发表时间：2019-01-08

发表刊物：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录刊物：SCIE、PubMed、Scopus

卷号：58

期号：2

页面范围：618-623

ISSN号：1433-7851

关键字：controlled synthesis; copolymerization; cyclic thioanhydrides; episulfides; poly(thioester)s

摘要：The precise synthesis of poly(thioester)s with diverse structures is still a significant challenge in the polymeric materials field. Herein, we report a novel approach to the synthesis of well-defined poly(thioester)s by the controlled alternating copolymerization of cyclic thioanhydrides and episulfides induced by simple organic ammonium salts. Both the cation and anion have strong effects on the copolymerization. [PPN]OAc ([PPN]=bis(triphenylphosphine)iminium) with a bulky cation was proven to be efficient in initiating this polymerization, yielding poly(thioester)s with a completely alternating structure, controlled molecular weight, and narrow polydispersity. The poly(thioester) obtained from succinic thioanhydride and propylene sulfide is a typical semicrystalline material, possessing a high refractive index of up to 1.78. Because it uses readily available monomers, this method is expected to open up a new route to poly(thioester)s with diverse structures and properties.