Polymer

1 A polymer is a large molecule (macromolecule) self-contained of retell structural units. These subunits argon typically connected by covalent chemical bonds. Although the termpolymer is sometimes taken to refer to plastics, it actually encompasses a large class comprising both natural and artificial materials with a wide admixture of properties. Because of the extraordinary range of properties of polymeric materials,[2] they play an essential and ubiquitous role in casual life.[3] This role ranges from old(prenominal) synthetic plastics and elastomers to natural biopolymers such as nucleic acids and proteins that are essential for life. Natural polymeric materials such as shellac, amber, and natural rubber have been used for centuries. A variety of opposite natural polymers exist, such as cellulose, which is the main grammatical dowry of wood and paper. The list of synthetic polymers includes synthetic rubber, Bakelite, neoprene, nyl on, PVC, polystyrene, polyethylene, polypropylene,polyacrylonitrile, PVB, silicone, and many more. to the highest leg commonly, the continuously linked backbone of a polymer used for the homework of plastics consists mainly of carbon atoms. A simple example is polyethylene, whose iterate unit is based on ethylene monomer.

However, other structures do exist; for example, elements such as silicon form acquainted(predicate) materials such as silicones, examples beingSilly Putty and waterproof plumbing sealant. group O is also commonly present in polymer backbones, such as those of polyethylene glycol, poly saccharides (in glycosidic bonds), and DN! A (in phosphodiester bonds). Polymers are studied in the plain stitch of polymer chemistry, polymer physics, and polymer science. Etymology The word polymer is derived from the Greek words ????- - poly-  heart many; and ????? - meros  inwardness part. The term was coined in 1833 by Jöns Jacob Berzelius, although his exposition of a polymer was quite different from the modern definition. [edit]Historical development From...If you call for to astonish a full essay, order it on our website: OrderCustomPaper.com

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