期刊
ACS MACRO LETTERS
卷 4, 期 9, 页码 862-866出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.5b00502
关键词
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资金
- Ministry of Education, Science and Technology [R31-10013]
- NRF for the National Creative Research Initiative Center for Intelligent Hybrids [2010-0018290]
- University of Delaware through Department of Materials Science
- NIST Award through Center for Neutron Science at the University of Delaware [70NANBIOH256]
- NSF [CHE-1305773]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1305773] Funding Source: National Science Foundation
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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