Dynamic Covalent Polymers via Inverse Vulcanization of Elemental Sulfur for Healable Infrared Optical Materials
Dynamic Covalent Polymers via Inverse Vulcanization of Elemental Sulfur for Healable Infrared Optical Materials
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DOI：
10.1021/acsmacrolett.5b00502
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发表时间：
2015-09-01
影响因子：
7.015
通讯作者：
Pyun, Jeffrey
中科院分区：
文献类型：
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作者：
Griebel, Jared J.;Nguyen, Ngoc A.;Pyun, Jeffrey
我们报道了由元素硫衍生的动态共价聚合物，这些聚合物可以用作中红外热成像应用的热治愈光学聚合物。通过访问这些硫磺共聚物中的动态S-S键，聚(无规硫磺-1，3-二异丙烯基苯)(聚(S-r-DIB))自支撑薄膜的表面划痕和缺陷可以热愈合，从而使这些材料损坏的透镜和窗口能够重新处理，以恢复其红外成像性能。这些硫磺共聚物与不同固化方法的力学性能的对比，为这些材料的损坏样品的再处理提供了启示。修复表面缺陷前后窗口的中红外热成像实验证明，这些材料成功地应用于创造了一种新的“划痕和愈合”光学聚合物。由于S-S键的动态特性和有用的光学特性，使用动态共价聚合物作为红外应用的可修复材料比目前的技术水平(例如，锗或硫化物玻璃)具有独特的优势。
We report on dynamic covalent polymers derived from elemental sulfur that can be used as thermally healable optical polymers for mid-IR thermal imaging applications. By accessing dynamic S-S bonds in these sulfur copolymers, surface scratches and defects of free-standing films of poly(sulfur-random-1,3-diisopropenylbenzene) (poly(S-r-DIB) can be thermally healed, which enables damaged lenses and windows from these materials to be reprocessed to recover their IR imaging performance. Correlation of the mechanical properties of these sulfur copolymers with different curing methods provided insights to reprocess damaged samples of these materials. Mid-IR thermal imaging experiments with windows before and after healing of surface defects demonstrated successful application of these materials to create a new class of "scratch and heal" optical polymers. The use of dynamic covalent polymers as healable materials for IR applications offers a unique advantage over the current state of the art (e.g., germanium or chalcogenide glasses) due to both the dynamic character and useful optical properties of S-S bonds.