Lee, Miyeon Jang, Se Gyu Yeo, Hyeonuk Park, Jong-Jin Moon, Bongjin You, Nam-Ho 2024-04-04T05:30:59Z 2024-04-04T05:30:59Z 2024-04-04 2024-03 0024-9297 https://pubs.kist.re.kr/handle/201004/149587 The structural characteristics of the organic cross-linker greatly affect the potential infrared (IR) optics applications of sulfur polymers synthesized through the inverse vulcanization reaction. Unlike elemental sulfur, organic cross-linkers induce various absorptions in the IR region and leave organic moieties that affect the IR transmittance, even after inverse vulcanization. Most of the cyclic olefin cross-linkers [e.g., dicyclopentadiene (DCPD)] investigated so far are expected to produce side reactions and form byproducts during inverse vulcanization. The side reactions caused by differences in reactivity between the reaction sites can result in the deterioration of the optical properties of sulfur polymers. In this study, thiol groups were introduced as a cross-linker to effectively control the side reactions and byproducts that may occur in inverse vulcanization. The sulfur and thiol cross-linkers reacted rapidly and uniformly at all reaction sites to form sulfur polymers without unwanted side reactions. Optical windows prepared with the sulfur polymer exhibited enhanced IR transparency and achieved thermal imaging of the human body in the long-wave IR (LWIR) region. By design of a cross-linker for LWIR transparent sulfur polymers, these results provide a useful solution for IR optics applications. English American Chemical Society Structural Effect of Cyclic Olefin Cross-Linkers on Long-Wave Infrared-Transmitting Sulfur Polymers Article 10.1021/acs.macromol.4c00018 1 Macromolecules, v.57, no.6, pp.2905 - 2914 Macromolecules 57 6 2905 2914 N scie scopus 001183924900001 2-s2.0-85187575072 Polymer Science Polymer Science Article ELEMENTAL SULFUR INVERSE VULCANIZATION CATHODE MATERIALS POLYMERIZATIONS POLYSULFIDE