👉 In chemistry, a copolymer is a polymer that contains one or more monomers (small molecules) linked together by a repeating unit called a backbone. Copolymers are formed when two or more different monomers are combined in a specific way to form a new substance with unique properties. The term "copolymer" refers to the process of combining two or more polymers, usually through a repeating unit known as a backbone, to produce a new polymer that has unique properties and is