This work studies the properties of poly(n-butyl acrylate) functionalized with 2,6-bis(1'-methylbenzimidazolyl)pyridine ligand and cross-linked with either copper(II), zinc(II), or cobalt(II) metal ions. Because of phase separation between the metal-ligand complex and the polymer matrix, these polymers have a rubbery plateau modulus that is 10 times higher than expected based on the theory of rubber elasticity. Differences in the metal-ligand bond strength influence the mechanical behavior at high temperature and strains. Because of the particularly weak bond strength associated with the copper-ligand bond, the metallopolymer containing copper degrades at a lower temperature and has lower yield strength, ultimate tensile strength, and creep resistance than polymers containing cobalt and zinc. To tune the properties of the polymer further, a polymer is made with both copper and cobalt ions. The hybrid polymer combines the properties of the stiffer cobalt-containing polymer with the more compliant copper-containing polymer.