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Rubber |
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Rubber is produced from natural
or synthetic sources. Natural rubber is obtained
from the milky white fluid called latex, found
in many plants; synthetic rubbers are produced
from unsaturated hydrocarbons.
Long before Colombus arrived in the Americas,
the native South Americans were using
rubber to produce a number of water-resistant
products. The Spaniards tried in vain to copy
these products (shoes, coats and capes), and it
was not until |
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the 18th century that European
scientists and manufacturers began to use rubber
successfully on a commercial basis. The British
inventor and chemist Charles Macintosh, in 1823,
established a plant in Glasgow for the
manufacture of waterproof cloth and the
rainproof garments with which his name has
become synonymous.
A major breakthrough came in the mid 19th
century with the development of the process of
vulcanisation. This process gives increased
strength, elasticity, and resistance to changes
in temperature. It also renders rubber
impermeable to gases and resistant to heat,
electricity, chemical action and abrasion.
Vulcanised rubber also exhibits frictional
properties highly desired for pneumatic tyre
application. |
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