A copolymer is a type of polymer made from two or more different monomers. These monomers are small, repeating units that chemically bond together to form a larger, more complex structure. By combining different monomers, copolymers can exhibit unique properties that are not found in homopolymers, which are made from only one type of monomer. Copolymers can be classified into various types, such as block copolymers, random copolymers, and graft copolymers, depending on how the different monomers are arranged. This versatility allows copolymers to be used in a wide range of applications, including plastics, elastomers, and coatings.