Polymer

1 A polymer is a large molecule (macromolecule) lay in of retell structural units. These subunits be typically connected by covalent chemical bonds. Although the termpolymer is sometimes taken to refer to plastics, it in reality encompasses a large split up comprising both native and pic materials with a wide intermixture of properties. Because of the extraordinary range of properties of polymeric materials,[2] they play an essential and omni yield role in c beless life.[3] This role ranges from old(prenominal) unreal plastics and elastomers to cancel biopolymers such as nucleic acids and proteins that atomic number 18 essential for life. Natural polymeric materials such as shellac, amber, and natural rubber have been employ for centuries. A variety of another(prenominal) natural polymers exist, such as cellulose, which is the main grammatical lot of wood and paper. The list of synthetic polymers includes synthetic rubber, Bakelite, neoprene, nylon, PVC, polystyrene, polyethylene, polypropylene,polyacrylonitrile, PVB, silicone, and many more. to the highest grad commonly, the continuously linked headstone of a polymer used for the planning of plastics consists mainly of carbon atoms. A simple example is polyethylene, whose ingeminate unit is based on ethylene monomer.

However, other structures do exist; for example, elements such as silicon form known materials such as silicones, examples beingSilly putty and waterproof plumbing sealant. type O is also commonly present in polymer backbones, such as those of polyethylene glycol, polysaccharides (in glycosidic bonds), and DNA (in phosphodiester bonds). Polymers are studied in the subject of polymer chemistry, polymer physics, and polymer science. Etymology The word polymer is derived from the Greek quarrel ????- - poly-  heart many; and ????? - meros  meaning part. The term was coined in 1833 by Jöns Jacob Berzelius, although his definition of a polymer was quite diametric from the modern definition. [edit]Historical development From...If you want to gravel a full essay, coif it on our website: Ordercustompaper.com

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