Chemical crosslinking is a process where chemical bonds form between polymer chains, creating a network structure. This enhances the material's strength, stability, and resistance to heat and chemicals. Crosslinked materials are commonly found in products like rubber, plastics, and gels. The crosslinking can occur through various methods, including heat, radiation, or chemical agents. For example, in the production of polyethylene, crosslinking improves its durability and performance in applications such as pipes and insulation. Overall, chemical crosslinking plays a crucial role in developing advanced materials with specific properties.