Definition of polysulphide in English:

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polysulphide

Pronunciation: /ˌpɒlɪˈsʌlfʌɪd/
(also polysulfide)

noun

Chemistry
1A compound containing two or more sulphur atoms bonded together as an anion or group.
Example sentences
  • Thiokol Chemical Corporation produced a synthetic rubber from ethylene dichloride and sodium polysulfide.
  • Approximately 3 lb of calcium carbonate are needed to neutralize the effect of 1 lb of sulfur applied as elemental sulfur or ammonium polysulfide.
1.1A synthetic rubber or other polymer in which the units are linked through such groups.
Example sentences
  • The polysulfide degrades, cracks and causes the window to fail and ‘fog up’.
  • These coatings exhibit the toughness and adhesion of epoxy, with the elasticity and chemical resistance of a polysulfide.
  • There are three common types: polysulfides, polyurethanes, and silicones.
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