ristisilloitetuiksi

ristisilloitetuiksi is a Finnish word that translates to "cross-linked" in English. It describes a process where molecules are joined together by covalent bonds, forming a three-dimensional network. This cross-linking can significantly alter the physical and chemical properties of a material. For example, cross-linking often increases the strength, rigidity, and thermal stability of polymers.

In materials science, cross-linking is a common technique used to modify polymers for various applications. For instance, vulcanization of rubber is a type of cross-linking that makes natural rubber much more durable and elastic. In hydrogels, cross-linking controls the swelling behavior and mechanical integrity of the gel network, making them useful in applications like contact lenses and drug delivery systems. The degree of cross-linking can be precisely controlled to achieve desired material properties. This process can be initiated by various methods, including heat, radiation, or chemical agents. The resulting cross-linked structures are generally insoluble and infusible, meaning they do not dissolve in solvents or melt when heated.