What is Cross Linking?
 

Cross-linking is used in both synthetic polymer chemistry and in the biological sciences. Although the term is used to refer to the "linking of polymer chains" for both sciences, the extent of crosslinking and specificities of the crosslinking agents vary. Of course, with all science, there are overlaps, and the following delineations are a starting point to understanding the subtleties.

When cross links are added to long rubber molecules, the flexibility decreases, the hardness increases and the melting point increases as well.

thanks for sharing this post.

Arent we missing something here? this is an SEO Forum and i believe the question was supposed to be cross linking in SEO.

Side by side (lateral) linking in which two or more adjacent molecules of a polymer join to form a bigger molecule.

Ok that's funny. SEO forum has a post about polymer. Maybe that can be quite a good blog niche? :D

A cross-link is a bond that links one polymer chain to another. They can be covalent bonds or ionic bonds. "Polymer chains" can refer to synthetic polymers or natural polymers (such as proteins).