Inverse vulcanisation of self-activating amine and alkyne crosslinkers

Dodd, Liam James; Sandy, William; Dop, Romy A.; Zhang, Bowen; Lunt, Amy; Neill, Daniel R.; Hasell, Tom

doi:10.1039/d3py00757j

Cited by 3 publications

(1 citation statement)

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“…Various attempts to apply cyclic olefin cross-linkers, such as dicyclopentadiene (DCPD) and norbornadiene (NBD) have been reported, in attempts to reduce the number of the CC bonds in the sulfur polymers after inverse vulcanization reactions. Nevertheless, challenges with IR transparency remain, , and some have not reported IR transmittance properties. − …”

Section: Introductionmentioning

confidence: 99%

Structural Effect of Cyclic Olefin Cross-Linkers on Long-Wave Infrared-Transmitting Sulfur Polymers

Lee,

Jang,

Yeo

et al. 2024

Macromolecules

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The structural characteristics of the organic crosslinker 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.

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Section: Introductionmentioning

confidence: 99%

Structural Effect of Cyclic Olefin Cross-Linkers on Long-Wave Infrared-Transmitting Sulfur Polymers

Lee,

Jang,

Yeo

et al. 2024

Macromolecules

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Sulfur‐Rich Polymers Coatings

King‐Poole,

Thérien‐Aubin

2024

Adv Funct Materials

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Advancements in the synthesis of sulfur‐rich materials are driving progress across diverse fields owing to the rich and tunable functionalities of those materials. These materials are typically valued for their electrochemical behaviors, high refractive indices, heavy metal affinity, and ability to form dynamic covalent bonding. As a result, their applications span various industries including electronics, catalysis, lithium‐sulfur batteries, water reclamation, and optoelectronics. Moreover, elemental sulfur, a byproduct of the petroleum industry, is produced abundantly, necessitating the exploration of novel valorization routes for polymers made from this feedstock. The unique combination of properties of sulfur‐rich polymers also makes them an ideal platform for the development of high‐performance functional coatings, offering durability and tailored functionalities for protective coatings, thus enhancing materials lifespan and performances in a variety of environmental conditions. The presence of dynamic covalent bonds in many sulfur‐rich polymers enables the creation of self‐healing coatings, while sulfur itself or the comonomers can contribute to antimicrobial, antifouling, and corrosion‐resistant properties. Furthermore, sulfur‐rich polymers have the potential to be used in the design of icephobic and superhydrophobic coatings. This underscores the versatility of sulfur‐rich polymers as a platform for the creation of advanced coatings with superior properties.

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