polysulphide


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polysulphide

(ˌpɒlɪˈsʌlfaɪd) or

polysulfide

n
(Elements & Compounds) any sulphide of a metal containing divalent anions in which there are chains of sulphur atoms, as in the polysulphides of sodium, Na2S2, Na2S3, Na2S4, etc
References in periodicals archive ?
Tenders are invited for Supplying Of Polysulphide Base Sealing Caulking Compound ( Rdl 940 Grade) For Vertical Surface (Gun Grade) In 4 Kg.
PCB contamination from polysulphide sealants in residential areas--exposure and risk assessment.
The 1-component brown polysulphide sealant H started showing fine map-like cracks, similar in size to those in sealant A (without a colouring agent);
Presently, only the polysulphide materials exhibit significant radiopacity due to their lead dioxide content.
The new products are MS sealant, which is environment-friendly, polysulphide sealant and structural glazing alkoxy silicone sealant.
The frame pieces are then combined with an IGU that was produced by separating two or more sheets of flat glass with an aluminum bar, filling the space between panes with argon, and sealing the chamber with a polysulphide sealant.
Since the equilibria between the different polysulphide oligomers are instantaneous (Steude1,1996) and despite our CE protocol could not detect all the polysulphides, tetrasulphide could still be relied upon to sense qualitatively the evolution of [S.
In the present paper, simulation is conducted to observe the changes in composition at different positions in a FGM that could be resulted from using both the single as well as multiple size particles under the influence of gravitational or centrifugal forces for silicon carbide (SiC) particles uniformly distributed in a thermosetting polysulphide epoxy resin, which is curing with time at constant temperature.
Alternatively, sulphur dioxide or sodium polysulphide can be used.
Li2S and Li2S2 b) fast capacity fading owing to the generation of various soluble polysulphide Li2Sn Intermediates andc) poorly controlled Li/electrolyte interface.
Concise Analysis of the International Sealants Market", analyzes the worldwide markets for Sealants in US$ Million and Million Pounds by the following Chemical Types: Anaerobic, Acrylic, Latex, Bitumen, Butyl Rubber, Epoxy, Oleoresinous, Polysulphide, Polyurethane, Polyvinyl-based, Polyvinyl Alcohol, Polyvinyl Chloride-based, Reclaimed Rubber, Silicone, Styrene Butadiene Rubber, Thermoplastic Rubber, and Miscellaneous.
The problem is that the reaction has a number of intermediate species--a series of polysulphide ions--which are soluble in the electrolyte.