Results 311 to 320 of about 24,485 (341)
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Advanced Energy Materials, 2020
The practical viability of Li–S cells depends on achieving high electrochemical utilization of sulfur under realistic conditions, such as high sulfur loading and low electrolyte/sulfur (E/S) ratio.
Jiarui He +4 more
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The practical viability of Li–S cells depends on achieving high electrochemical utilization of sulfur under realistic conditions, such as high sulfur loading and low electrolyte/sulfur (E/S) ratio.
Jiarui He +4 more
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1996
Publisher Summary This chapter provides an overview of polysulfides; whether aliphatic or aromatic, have excellent physical and chemical properties, which make them one of the leaders in petrochemical industries as elastomers and engineering thermoplastics.
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Publisher Summary This chapter provides an overview of polysulfides; whether aliphatic or aromatic, have excellent physical and chemical properties, which make them one of the leaders in petrochemical industries as elastomers and engineering thermoplastics.
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1977
Disulfides and polysulfides have the structure R1SSnR2, in which chains of sulfur atoms are terminated by two groups that may be the same, different, or connected in a ring. Chapter 7 considers only substances where the S-R bond involves a carbon linkage; a review is available of structures such as ROSnOR and R2NSnNR2) Disulfides (n = 1) and their ...
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Disulfides and polysulfides have the structure R1SSnR2, in which chains of sulfur atoms are terminated by two groups that may be the same, different, or connected in a ring. Chapter 7 considers only substances where the S-R bond involves a carbon linkage; a review is available of structures such as ROSnOR and R2NSnNR2) Disulfides (n = 1) and their ...
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Perpetration of polysulfide rubber
Journal of Chemical Education, 1978This paper presents the laboratory preparation of Thiokol A, which offers an excellent demonstration of the polymerization concept.
George R. Pettit, George R Pettit
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Formation of Polysulfides in Aqueous Solution
Environmental Letters, 1973Abstract Polysulfides are found to be the reaction intermediates in the oxygenation of aqueous sulfide. The pH dependence of the reaction rates is directly related to the formation of polysulfides. In general, the peak of polysulfide concentrations fall within the range pH 7.0 ± 0.4, and decrease drastically in both acidic and alkaline solutions. Under
Kenneth Y. Chen, Shailendra K. Gupta
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Cation-doped ZnS catalysts for polysulfide conversion in lithium–sulfur batteries
Nature Catalysis, 2022Zihan Shen +11 more
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The cure chemistry of polysulfides
International Journal of Adhesion and Adhesives, 1997Abstract Liquid polysulfide polymers can be cured by a wide variety of compounds and through a number of reaction paths. The most commonly used system is the oxidation of the thiol terminal groups in the presence of metal peroxides. Addition and substitution reactions are also possible with such diverse products as epoxy resins, isocyanates, acrylics
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Disulfide interchange in polysulfide polymers
Journal of Polymer Science, 1956AbstractA study has been made on the effect of thiols and disulfides on lowering the molecular weight of polysulfide polymers. It was shown that in the presence of aqueous sodium disulfide there is an interchange of chain segments. This effect is observable if a simple organic disulfide is present in the system, resulting in a lower molecular weight ...
E. M. Fettes +2 more
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Electrochemistry of Sulfur and Polysulfides in Ionic Liquids
The Journal of Physical Chemistry B, 2011The electrochemistry of elemental sulfur (S(8)) and the polysulfides Na(2)S(4) and Na(2)S(6) has been studied for the first time in nonchloroaluminate ionic liquids. The cyclic voltammetry of S(8) in the ionic liquids is different to the behavior reported in some organic solvents, with two reductions and one oxidation peak observed.
Manan, Ninie S. A. +6 more
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Advances in Materials, 2019
The shuttling behavior and sluggish conversion kinetics of the intermediate lithium polysulfides (LiPSs) represent the main obstructions to the practical application of lithium–sulfur (Li–S) batteries.
Yuan Tian +10 more
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The shuttling behavior and sluggish conversion kinetics of the intermediate lithium polysulfides (LiPSs) represent the main obstructions to the practical application of lithium–sulfur (Li–S) batteries.
Yuan Tian +10 more
semanticscholar +1 more source