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Indexed by:期刊论文

Date of Publication:2019-01-08

Journal:ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Included Journals:SCIE、PubMed、Scopus

Volume:58

Issue:2

Page Number:618-623

ISSN No.:1433-7851

Key Words:controlled synthesis; copolymerization; cyclic thioanhydrides; episulfides; poly(thioester)s

Abstract: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.