近日，华南理工大学张广照团队研究了元素硫与二异氰酸酯的环化聚合：迈向高性能聚合物的新聚合。相关论文于2025年4月22日发表在《德国应用化学》杂志上。

聚合物材料的发展在很大程度上依赖于新的聚合反应。研究组报道了在室温下，以1,5,7-三氮杂二环[4.4.0]癸-5-烯（TBD）有机碱为催化剂，元素硫（S8）和脂肪族二异氰酸酯的环化聚合的发现，其中两种单体通过形成噻二唑烷酮（TDZD）或环状异氰脲酸酯环共价连接。S8和1,6-二异氰酸根己烷（HDI）的聚合物表现出显著的热稳定性和机械性能。

特别是，它在空气或水下对各种基材具有极高的粘附力，例如，聚（乙二醇-co-1,4-环己烷二甲醇对苯二甲酸酯）（PETG）的水下粘附强度高达约26.5 MPa，聚（四氟乙烯）（特氟龙）的水上粘附强度高至约2.3 MPa。环化聚合为合成含元素硫的高性能聚合物提供了基础。

附：英文原文

Title: Cyclization Polymerization of Elemental Sulfur and Diisocyanate: New Polymerization Toward High Performance Polymer

Author: Guangzhao Zhang, Jikai Zhang, Yongkang Zuo, Hongxin Yao, Jianwei Zhang, Wenyan Huang, Hongjun Yang

Issue&Volume: 2025-04-22

Abstract: The development of polymer materials heavily relies on new polymerization reactions. Herein, we report the discovery of cyclization polymerization of element sulfur (S8) and aliphatic diisocyanate at room temperature with 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) organic base as the catalyst, where the two monomers are covalently linked via formation of thiadiazolidinone (TDZD) or cyclic isocyanurate ring. The polymer of S8 and 1,6-diisocyanatohexane (HDI) exhibits remarkable thermal stability and mechanical properties. Particularly, it has exceptionally high adhesion to various substrates in air or under water, e.g., the underwater adhesion strength is as high as ~26.5 MPa for poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) and ~2.3 MPa for poly(tetrafluoroethylene) (Teflon). The cyclization polymerization provides the basis for the synthesis of high-performance polymers with elemental sulfur.

DOI: 10.1002/anie.202502207

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202502207