 There are three methods of synthesis, grafting to, grafting from, and grafting through, that are used to construct a graft polymer.There are many different approaches to synthesizing graft copolymers.Usually they employ familiar polymerization techniques that are commonly used such as atom transfer radical polymerization (ATRP), ring-opening metathesis polymerization (ROMP), anionic and cationic polymerizations, and free radical living polymerization.