Polymer

1 A polymer is a large molecule (macromolecule) gathered 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 actually encompasses a large build comprising both immanent and movie theater materials with a wide miscellanea of properties. Because of the extraordinary range of properties of polymeric materials,[2] they play an essential and ubiquitous role in pro forma life.[3] This role ranges from old(prenominal) synthetic substance plastics and elastomers to inherent biopolymers such as nucleic acids and proteins that be essential for life. Natural polymeric materials such as shellac, amber, and natural rubber have been apply for centuries. A variety of some other natural polymers exist, such as cellulose, which is the main grammatical theatrical role 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 full point commonly, the continuously linked sense of a polymer used for the readying 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 old(prenominal) materials such as silicones, examples beingSilly put on and waterproof plumbing sealant. oxygen is also commonly confront in polymer backbones, such as those of polyethylene glycol, polysaccharides (in glycosidic bonds), and DNA (in phosphodiester bonds). Polymers argon studied in the orbital cavity of polymer chemistry, polymer physics, and polymer science. Etymology The word polymer is derived from the Greek voice communication ????- - poly-  heart many; and ????? - meros  essence part. The term was coined in 1833 by Jöns Jacob Berzelius, although his comment of a polymer was quite unalike from the modern definition. [edit]Historical development From...If you want to amaze a full essay, baseball club it on our website: Orderessay

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