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Rubber is a natural polymer of isoprene (polyisoprene), and an elastomer (a stretchy polymer). Polymers are simply chains of molecules that can be linked together. Rubber is one of the few naturally occurring polymers and prized for its high stretch ratio, resilience, and water-proof properties.
Hevea brasiliensis is a tall deciduous tree growing to a height of up to 43 m (141 ft) in the wild. Cultivated trees are usually much smaller because drawing off the latex restricts their growth. The trunk is cylindrical and may have a swollen, bottle-shaped base. The bark is some shade of brown, and the inner bark oozes latex when damaged.
French botanist and explorer Jean Baptiste Christophore Fusée Aublet first described Hevea as a genus in 1775. [4][5][6] H. brasiliensis and H. guianensis are large trees, often reaching more than 30 m (100 ft) in height. Most of the other members of the genus are small to medium trees, and H. camporum is a shrub of around 2 m (7 ft).
A rubber band (also known as an elastic, gum band or lacky band) is a loop of rubber, usually ring or oval shaped, and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845, by Stephen Perry. [1][2][3] Most rubber bands are manufactured out of natural rubber as well as for latex free rubber ...
Elastomer. An elastomer is a polymer with viscoelasticity (i.e. both viscosity and elasticity) and with weak intermolecular forces, generally low Young's modulus (E) and high failure strain compared with other materials. [1] The term, a portmanteau of elastic polymer, [2] is often used interchangeably with rubber, although the latter is ...
Infobox references. Nitrile rubber, also known as nitrile butadiene rubber, NBR, Buna-N, and acrylonitrile butadiene rubber, is a synthetic rubber derived from acrylonitrile (ACN) and butadiene. [1] Trade names include Perbunan, Nipol, Krynac and Europrene. This rubber is unusual in being resistant to oil, fuel, and other chemicals.
In natural rubber, each cross-link produces a network node with four chains emanating from it. It is the network that gives rise to these elastic properties. Because of the enormous economic and technological importance of rubber, predicting how a molecular network responds to mechanical strains has been of enduring interest to scientists and ...
Rubberwood. Rubberwood is a light-colored medium-density tropical hardwood obtained from the Pará rubber tree (Hevea brasiliensis), usually from trees grown in rubber plantations. [1] Rubberwood is commonly advertised as an "environmentally friendly" wood, as it makes use of plantation trees that have already served a useful function.
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