Dynamic Sulfur-Rich Polymers from Elemental Sulfur and Epoxides  

作　　者：Ke-Xiang Chen Chen-Hui Cui Zhen Li Ting Xu Hao-Qing Teng Zhi-Yuan He Yin-Zhou Guo Xiao-Qing Ming Zhi-Shen Ge Yan-Feng Zhang Tie-Jun Wang 

机构地区：[1]School of Chemistry,Engineering Research Center of Energy Storage Materials and Devices,Ministry of Education,Xi’an Jiaotong University,Xi’an,710049,China [2]State Key Lab for Strength and Vibration of Mechanical Structures,Department of Engineering Mechanics,Xi’an Jiaotong University,Xi’an,710049,China

出　　处：《Chinese Journal of Polymer Science》2024年第10期1479-1487,I0010,共10页高分子科学（英文版）

基　　金：financially supported by the State Key R&D Program of China (No. 2019YFA0706801);the National Natural Science Foundation of China (No. 52173079);the Fundamental Research Funds for the Central Universities (Nos. xtr052023001 and xzy022024024)。

摘　　要：Sulfur-containing dynamic polymers had attracted significant attention due to their unique chemical structures with high reversibility.Utilizating sulfur, an inexpensive industrial waste product, to synthesize dynamic polysulfide polymers through reverse vulcanization has been a notable approach. However, this method required high temperatures and resulted in the release of unpleasant oders. In this study, we presented a robust method for the preparation of sulfur-rich polymers with dynamic polysulfide bonds from elemental sulfur and inexpensive epoxide monomers via a one-pot strategy at the mild room temperature. Different types of polysulfide molecules and polymers were synthesized by reacting various epoxide compounds with sulfur, along with the investigation of their structures and dynamic behaviors. It was noteworthy that the obatined polymers prepared from m-(2,3-epoxypropoxy)-N,N-bis(2,3-epoxypropyl)aniline and elemental sulfur exhibit multiple dynamic behaviors, including polysulfide metathesis and polysulfide-thiol exchange, enabling their rapid stress relaxation, self-healing, reprocessing and degradable properties of the cross-linked polymer. More importantly, the hydroxyl groups at the side chains from epoxide ring opening exhibited potential transesterification. This work provided a facile strategy for designing dynamic sulfur-rich polymers via a mild synthesis route.

关 键 词：Elemental sulfur Sulfur-containing polymer Dynamic covalent bond Dynamic polymer 

分 类 号：TQ317[化学工程—高聚物工业]