ABSTRACT
Many of the long names begin with ''poly," which simply means many or multiple. The smallest repeating unit in the chemical structure of plastics (which is a molecule) is called a monomer. When several monomers are combined or joined, the resulting chemical structure is called a polymer. So it becomes clear that polyethylene, polypropylene and the others beginning with the letters "poly'' are plastics consisting of a combination of monomers. A further understanding of the molecular structure of plastics is not required, but is available in several references [3].
