Cross-linked

Cross-linked describes the process or state where polymer chains are connected to each other via chemical bonds, forming a three-dimensional network structure. This interconnectedness significantly alters the material's properties, typically increasing its strength, rigidity, and resistance to solvents and heat. The degree of cross-linking influences the material's elasticity, with higher cross-linking often leading to a more rigid and less flexible material. The process is often used in the production of plastics, rubbers, and adhesives, improving their durability and performance. The nature of the cross-links (covalent, ionic, etc.) further dictates the material's specific characteristics. This process leads to greater structural integrity and dimensional stability.

Cross-linked meaning with examples

• The rubber tires' enhanced durability is attributed to the cross-linking of polymer chains during the vulcanization process. This crucial step creates strong bonds, improving wear resistance and preventing degradation from heat.
• Researchers are studying novel cross-linking methods to strengthen biopolymers for medical implants, ensuring the devices can withstand bodily stresses while minimizing unwanted reactions within the human body.
• The adhesive's enhanced holding power comes from the cross-linking agent, which bonds the molecules together, preventing the material from easily separating or dissolving after being applied to a surface.
• By carefully controlling the degree of cross-linking, manufacturers can tailor the properties of plastic containers, creating materials that can be either rigid and durable or flexible and impact resistant based on the materials needs.
• In tissue engineering, cross-linking is utilized to create scaffolds which promote cell adhesion and growth. These synthetic structures support new tissue formation due to their enhanced biological compatibility.