There are two types of Polymers, namely: naturally occurring and synthetic or man-made.Natural polymeric materials like shellac, hemp, wool, silk, natural rubber have been used for centuries. Also, there exist other natural polymers like cellulose, which is the major constituent of paper and wood.Synthetic polymers include polypropylene, polyethylene, polyvinyl chloride, phenol-formaldehyde resin/Bakelite, nylon, neoprene, silicone, PVB, and many more. Greater than 330 million tons of these polymers are made every year, as of 2015.