共价键
材料科学
对偶(语法数字)
红外线的
纳米技术
动态共价化学
分子
有机化学
光学
化学
艺术
物理
文学类
超分子化学
作者
Chenhui Cui,Fang Wang,Xingxing Chen,Ting Xu,Zhen Li,Kexiang Chen,Yinzhou Guo,Yilong Cheng,Zhishen Ge,Yanfeng Zhang
标识
DOI:10.1002/adfm.202315469
摘要
Abstract Infrared transmitting materials (IRTMs) are prone to mechanical and corrosion damage during long‐time exposure to harsh outside environments. However, conventional IRTMs frequently lack self‐repairability that limit their lifespan. To address the limitation, thioctic acid‐based epoxy resins (TAEs) are developed from natural thioctic acid and commercial epoxy monomers. The double ring‐opening polymerization (ROP) reactions of thioctic acid and epoxy groups result in dual dynamic covalent bonds with varying bond energies containing relatively weak disulfide bonds and strong ester bonds. As compared with conventional covalent adaptable networks (CANs) that present rapid creep properties when heated, TAEs maintain their geometric stability during rapid self‐repairing at a mild temperature of 80 °C by enhancing network integrity through stable ester crosslinking points. The feature renders TAEs self‐repairing capability while maintaining precise geometrical dimensions, which is suitable for infrared transmitting devices. On the other hand, TAEs exhibit high near‐infrared transmittance (>80%). Therefore, TAEs with self‐repairability and high infrared transmittance demonstrate they can be used as superior polymeric IRTM.
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