Synthesis and Characterization of Disiloxane Cross-Linked Polysulfides

Park, Kun Woo; Žujović, Zoran D.; Leitao, Erin M.

doi:10.1021/acs.macromol.1c02558

Cited by 15 publications

(27 citation statements)

References 49 publications

(115 reference statements)

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“…The activated polysulfide chains could then react with more of the vinyl groups present leading to a highly cross-linked material. 35…”

Section: Resultsmentioning

confidence: 99%

“…This occurs as the vinyl groups that have been attacked by the polysulfide radical form a polysulfide chain that prevents the other unreacted vinyl groups from coming into contact with another polysulfide radical. 35…”

Section: Resultsmentioning

confidence: 99%

“…This is similar to what was observed previously with other siloxanes containing vinyl functionalities and matches with what we observe during SS NMR spectroscopy. 35 After the vinyl groups have been attacked by the polysulfide radical, the polysulfide chain that forms prevents the other unreacted vinyl groups from being accessed. These results indicate that, under the reaction conditions, there is a maximum wt% S able to undergo cross-linking with cyclosiloxanes leaving unreacted sulfur and vinyl groups above the maximum.…”

Section: Resultsmentioning

confidence: 99%

“…The activated polysulfide chains could then react with more of the vinyl groups present leading to a highly cross-linked material. 35 A general trend was observed where an increase in the wt% S correlated to the brittleness of the material formed. All products were black and opaque, similar to other materials created using catalytic inverse vulcanisation (Fig.…”

Section: Synthesis Of Polysulfides Through Inverse Vulcanizationmentioning

confidence: 88%

“…The final study was highlighted in 2022 by Park et al and involved cross-linking polysulfide with the simplest siloxane containing diene functionalities, 1,3-diallyl-tetramethyldisiloxane and 1,1,3,3-tetramethyl-1,3-divinyldisiloxane. 35 It was observed, in this case, that the difference in cross-linker chain length and synthetic method used for the different cross-linkers, resulted to very different materials after inverse vulcanisation. For example, at a higher wt% S for the poly(S- r -vinyldisiloxane) series ( e.g.…”

Section: Introductionmentioning

confidence: 86%

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Synthesis and characterization of polysulfides formed by the inverse vulcanisation of cyclosiloxanes with sulfur

et al. 2022

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“…The activated polysulfide chains could then react with more of the vinyl groups present leading to a highly cross-linked material. 35…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Polysulfides Through Inverse Vulcanizationmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 86%

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Synthesis and characterization of polysulfides formed by the inverse vulcanisation of cyclosiloxanes with sulfur

et al. 2022

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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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Step‐growth Polymerization of Aziridines with Elemental Sulfur: Easy Access to Linear Polysulfides and Their Use as Recyclable Adhesives

Huang,

Zheng,

Luo

et al. 2024

Angewandte Chemie

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The bulk radical polymerization of bis(aziridine) with molten elemental sulfur resulted in brittle, cross‐linked polymers. However, when the bis(aziridine) was treated with elemental sulfur in the presence of an organobase, the ring‐opening reaction of aziridine with oligosulfide anions occurred, leading to the formation of linear polymers by step‐growth polymerization. These newly synthesized polymers possess repeating units containing a sulfonamide or amide functional moiety and oligosulfide bonds with an average sulfur segment of about two. A small molecular model reaction confirmed the nucleophilic addition reaction of elemental sulfur to aziridine. It was verified that S–S dynamic bond exchange takes place in the presence of an organic base within the linear chains. The mixture of the synthesized polysulfides with pyridine exhibits exceptional adhesive properties when applied to steel, and aluminum substrates. Notably, these prepared adhesives displayed good reusability due to the dynamic S‐S exchange and complete recyclability due to their solution processability. This elemental sulfur‐involved polymerization approach represents an innovative method for the synthesis of advanced sulfur‐containing polymers, demonstrating the potential for various applications in adhesives and beyond.

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Synthesis and Characterization of Disiloxane Cross-Linked Polysulfides

Abstract: The discovery of inverse vulcanization has resulted in the formation of stable polysulfide materials synthesized from cheap and abundant elemental sulfur. To stabilize the sulfur chains, carbon-based cross-linkers containing alkene moieties have been the focus of the field so far.

Cited by 15 publications

References 49 publications

Synthesis and characterization of polysulfides formed by the inverse vulcanisation of cyclosiloxanes with sulfur

Synthesis and characterization of polysulfides formed by the inverse vulcanisation of cyclosiloxanes with sulfur

Sulfur‐Rich Polymers Coatings

Step‐growth Polymerization of Aziridines with Elemental Sulfur: Easy Access to Linear Polysulfides and Their Use as Recyclable Adhesives

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