Materials composed of large molecules generally based on carbon,that have been formed from the chemical bonding of monomers.Monomers are small units which repeats to form polymers.They are commonly known as plastics. Polymers are used in an amazing number of applications including clothing, toys,home appliances, structural and decorative items, coatings, paints, adhesives, automobile tires,biomedical,materials, car bumpers and interiors, foams, and packaging.