Cross-link is a bond which links one polymer chain to other. ... Cross linking increases the molecular mass of a polymer. Cross-linked polymers are important because they are mechanically strong and resistant to heat, wear and attack by solvents.

Why are cross links important?

Cross-linking is the process of stabilizing collagen by creating new links between strands of collagen; this process inhibits degradation of the collagen by proteases and prolongs its presence in the wound [28]. The type of cross-linking process that takes place directly affects the durability of acellular matrices.

What is the major purpose of cross-linking in polymers?

Polymers for Advanced Functional Materials

By cross-linking, the structure of a polymer solution can be fixed. The resulting polymer networks (or gels) show elastic behavior and, depending on the system, good mechanical properties. Polymer networks are able to swell by uptaking water or organic solvents.