硫酯
共聚物
高分子化学
化学
分散性
单体
亚胺离子
材料科学
有机化学
聚合物
离子
酶
作者
Tian‐Jun Yue,Ming‐Chao Zhang,Ge‐Ge Gu,Li‐Yang Wang,Wei‐Min Ren,Xiao‐Bing Lu
标识
DOI:10.1002/anie.201812135
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.
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