材料科学
聚合物
共价键
硫化
固化(化学)
共聚物
硫黄
硫系化合物
复合材料
纳米技术
天然橡胶
光电子学
有机化学
化学
冶金
作者
Jared J. Griebel,Ngoc A. Nguyen,Soha Namnabat,L. E. Anderson,Richard S. Glass,Robert A. Norwood,Michael E. Mackay,Kookheon Char,Jeffrey Pyun
出处
期刊:ACS Macro Letters
[American Chemical Society]
日期:2015-08-16
卷期号:4 (9): 862-866
被引量:191
标识
DOI:10.1021/acsmacrolett.5b00502
摘要
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.
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