文献类型：期刊文献

英文题名：Closed-loop chemically recyclable covalent adaptive networks derived from elementary sulfur

作者：Shi, Chen-Yu[1];Zhang, Xiao-Ping[1];Zhang, Qi[1];Chen, Meng[1];Tian, He[1];Qu, Da-Hui[1]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr,Key La, Frontiers Sci Ctr Materiobiol & Dynam Chem,Sch Che, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：15

期号：42

起止页码：17460

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20244117179277);WOS:【SCI-EXPANDED(收录号:WOS:001324630600001)】；

基金：This work was supported by the National Natural Science Foundation of China (grant no. 22220102004, 22025503, and 22405090), the Shanghai Municipal Science and Technology Major Project (grant no. 2018SHZDZX03), the Innovation Program of Shanghai Municipal Education Commission (2023ZKZD40), the Fundamental Research Funds for the Central Universities, the Programme of Introducing Talents of Discipline to Universities (grant no. B16017), the Science and Technology Commission of Shanghai Municipality (grant no. 21JC1401700), the Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study (grant no. SN-ZJU-SIAS-006), the Postdoctoral Fellowship Program of CPSF (GZB20230210), and the China Postdoctoral Science Foundation (2023TQ0114 and 2024M750900). We thank LetPub (www.letpub.com.cn) for their linguistic assistance during the preparation of this manuscript.

语种：英文

外文关键词：Anionic polymerization - Copolymers - Crosslinking - Polysulfides - Ring opening polymerization

摘要：The development of sulfur-rich polymers derived from elementary sulfur provides an innovative approach to industrial waste valorization. Despite significant advancements in polymerization techniques and promising applications beyond traditional polymers, polysulfide networks are still primarily stabilized by diene crosslinkers, forming robust C-S bonds that hinder the degradation of sulfur-based polymers. In this study, the anionic ring-opening copolymerization of chemically homologous S8 and cyclic disulfides was explored to yield robust sulfur-rich copolymers with high molecular weight. The incorporation of polysulfide segments not only efficiently activated the crosslinked networks for excellent reprocessability and mechanical adaptability but also endowed the resulting copolymer with high optical transparency in the near-infrared region. More importantly, the dynamic disulfide crosslinking sites promoted the chemical closed-loop recyclability of the polysulfide networks via reversible S-S cleavage. This innovative inverse vulcanization strategy utilizing dynamic disulfide crosslinkers offers a promising pathway for the advanced applications and upcycling of high-performance sulfur-rich polymers. Anionic copolymerization of chemically homologous elementary sulfur and cyclic disulfides is explored for robust sulfur-rich copolymers with chemical recyclability, which is promoted by reversible S-S cleavage of dynamic disulfide crosslinking sites.