Polymers are long chains of monomeric compounds that are produced by polymerisation of these monomers. Ranging from natural to synthetic, polymers play a very ubiquitous role in pharmaceutical sciences and chemistry. Polystyrene, nylon is some of the examples of synthetic polymers whereas DNA and proteins are called as biopolymers. A most common example of polymer is polythene bag. Natural compound materials like shellac, amber, wool, silk and natural rubber are used for hundreds of years. A spread of alternative natural polymers exists, like polysaccharide, that is that the main constituent of wood and paper. The list of artificial polymers includes India rubber, phenol aldehyde rosin (or Bakelite), neoprene, nylon, polyvinyl resin (PVC or vinyl), vinylbenzene, polythene, plastic, polyacrylonitrile, PVB, silicone, and plenty of additional. Most ordinarily, the ceaselessly coupled backbone of a chemical compound used for the preparation of plastics consists chiefly of carbon atoms. An easy example is polythene ('polythene' in British English), whose continuation unit is predicated on alkene compound. However, alternative structures do exist; for instance, parts like element type acquainted materials like silicones, examples playing around Putty and waterproof plumbing sealer. Gas is additionally ordinarily gift in chemical compound backbones, like those of polythene glycol, polysaccharides (in glycosidic bonds), and DNA (in phosphodiester bonds). Laboratory artificial strategies area unit usually divided into 2 classes, step-growth chemical change and chain-growth chemical change. The essential distinction between the two is that in chain growth chemical change, monomers area unit side to the chain one at a time solely, like in polythene, whereas in step-growth chemical change chains of monomers could mix with each other directly, like in polyester. However, some newer strategies like plasma chemical change don't match showing neatness into either class. Artificial chemical change reactions could also be disbursed with or while not a catalyst. Laboratory synthesis of biopolymers, particularly of proteins, is a district of intensive analysis.
Last date updated on July, 2014