A polymerization reaction occurs when monomers bond together to create polymers. These macromolecules can either be formed through covalent or noncovalent linking of monomer chains.
Monomers are structural units that serve as the fundamental building blocks of large-sized molecules called polymers. When monomers are covalently bonded, the polymerization process can be classified into three types: addition reaction, condensation polymerization and ring-opening polymerization. The polymers formed from this process are characterized by a soft, rubbery texture or a rigid consistency, which is comparable to cured epoxy. The synthesis of polymers may also result from the noncovalent linking of monomers in the form of hydrogen bonds, dipole-dipole interactions and London forces.