Definition: Copolymers are molecules that contain a repeating unit of one or more monomers, typically consisting of two or more different monomers. Copolymers can be formed by adding a single monomer to another molecule, resulting in a new polymer with a unique structure and properties. Examples of copolymerized polymers include polyethylene terephthalate (PET) and polypropylene, which are both made from ethylene and propylene. Copolymers have the potential