Polymer

1 A polymer is a large molecule (macromolecule) tranquil of retell structural units. These subunits atomic number 18 typically connected by covalent chemical bonds. Although the termpolymer is sometimes taken to refer to plastics, it rattling encompasses a large several(predicate)iate comprising both earthy and picture palace materials with a wide smorgasbord 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) celluloid plastics and elastomers to instinctive 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 apply for centuries. A variety of another(prenominal) natural polymers exist, such as cellulose, which is the main grammatical fate 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 score commonly, the continuously linked sense of a polymer used for the planning of plastics consists mainly of carbon atoms. A simple example is polyethylene, whose reiterate unit is based on ethylene monomer.

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

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