vulcanization

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Submarine vulcanization has been spewing CO2 in the ocean since the oceans begining billions of years ago.

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Definitions (3)

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  1. A method of treating caoutchouc or india-rubber with some form of sulphur, to effect certain changes in its properties, and yield a soft (vulcanized india-rubber) or a hard (vulcauite) product. This was originally effected by dipping the rubber in melted sulphur and beating it to nearly: 300. Several other methods have been employed, probably the best of which for general purposes consists in mechanically mixing the rubber at a moderate heat with flowers of sulphur, and subsequently “curing” it in superheated steam at from 250 to 300 Fahr. The process was invented by Charles Goodyear, who obtained his first patent for it in 1844. Other ingredients, as litharge, white lead, zine-white, whiting, etc., are added to the sulphur to give color, softness, etc., to the rubber. The substance thus formed possesses the following properties: it remains elastic at all temperatures; it cannot be dissolved by the ordinary solvents, neither is it affected by heat within a considerable range of temperature; finally, it acquires extraordinary powers of resisting compression, with a great increase of strength and elasticity. Vulcanized india-rubber is employed with great success for very many useful purposes, as for waterproofing cloth, for boots, shoes, mats, toys, belting, buffers, wheel-tires, washers, valves, pipes, fire-hose, medical and surgical appliances, etc. Hard vulcanized rubber is known as ebonite or vulcanite. See vulcanite. Also spelled vulcanisation.

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Examples (33)

  • Submarine vulcanization has been spewing CO2 in the ocean since the oceans begining billions of years ago. —  Latest Articles
  • Tire renovation means discarded tires recover its use value after sectional repair, processing, re-pasting the tread rubber and vulcanization.
  • The quality of a renovated tire with pre-vulcanization approaches a new tire while it is only the equivalent of 15\%-30\% in the consumption of raw materials of a new tire in the same standard, 20\%-30\% in consumption of power and 80\% in price.
  • Sulfur is also used in the vulcanization of rubber, fungicides, the manufacture of phosphate fertilizers, and batteries. —  CreationWiki - Recent changes [en]
  • To clarify further, vulcanization is the process of curing natural rubber with heat and pressure, to produce saturated double bonds which increase strength, resiliency and durability. —  Boing Boing
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