硫醚
咪唑
固化(化学)
环氧树脂
材料科学
聚合
高分子化学
聚合物
有机化学
复合材料
化学
作者
Yang You,Zhaozhi Wang,Qin Chen,Li Hai,Longming Jin,Kai Ma,Caijuan Huang,Haibo Xie
出处
期刊:ACS Macro Letters
[American Chemical Society]
日期:2023-07-28
卷期号:12 (8): 1151-1158
被引量:4
标识
DOI:10.1021/acsmacrolett.3c00400
摘要
One-component epoxy resins based on latent curing agents have garnered research attention owing to their outstanding storage stability and excellent processability, while their development considerably depends on the design and preparation of sustainable latent curing agents. Herein, taking structural advantage of lignin-derived vanillin, a biobased polymerizable aromatic imidazole monomer with α,ω-diene functionality was designed and prepared, which was applicable in subsequent thiol-ene polymerization, yielding a series of robust poly(thioether imidazoles) with excellent tunability of the structure and properties. The findings indicated that the precursors comprising poly(thioether imidazole) and commercially available epoxy resins could keep their fluidity at 25 °C for over 90 days and rapidly cured into resins under elevated temperature, demonstrating that the poly(thioether imidazole) can serve as both a latent curing and toughening agent for one-component epoxy resins because of homopolymerization initiated by imidazole groups and the introduction of an aliphatic chain in the as-prepared poly(thioether imidazole) matrix.
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