Polymer

When certain individual molecules (monomers) come together and link up in a chain-like fashion they form a polymer. The chemical reaction that forms a polymer is called polymerisation. There are natural polymers (often referred to as biopolymers), such as cellulose, certain rubbers and DNA, and synthetic polymers, such as polystyrene and fibreglass (see uPES). See also Plastics, Resins and Rubber.