Polymers are obtained by the chemical reaction of monomers. In nature, this process results in the formation of natural polymers, while synthetic polymers are made by humans. Polymers are naturally present in our environment from the very beginning (e.g. cellulose, starch, and natural rubber). Although man-made polymeric materials have been studied since the middle of the nineteenth century, today the polymer industry has developed rapidly. In fact, copper has a larger place than steel, aluminum, and some other industries.