Editing Adhesion (section)

==Strength==
The strength of the adhesion between two materials depends on which of the above mechanisms occur between the two materials, and the surface area over which the two materials contact. Materials that wet against each other tend to have a larger contact area than those that do not. Wetting depends on the surface energy of the materials.

Low surface energy materials such as [[polyethylene]], [[polypropylene]], [[polytetrafluoroethylene]] and [[polyoxymethylene]] are difficult to bond without special surface preparation.

Another factor determining the strength of an adhesive contact is its shape. Adhesive contacts of complex shape begin to detach at the "edges" of the contact area.<ref>{{Cite journal|last1=Popov|first1=Valentin L.|last2=Pohrt|first2=Roman|last3=Li|first3=Qiang|date=2017-09-01|title=Strength of adhesive contacts: Influence of contact geometry and material gradients|journal=Friction|language=en|volume=5|issue=3|pages=308–325|doi=10.1007/s40544-017-0177-3|issn=2223-7690|doi-access=free}}</ref> The process of destruction of adhesive contacts can be seen in the film.<ref>{{Citation|last=Friction Physics|title=Science friction: Adhesion of complex shapes|date=2017-12-06|url=https://www.youtube.com/watch?v=aV2W91d8vwQ |archive-url=https://ghostarchive.org/varchive/youtube/20211221/aV2W91d8vwQ |archive-date=2021-12-21 |url-status=live|access-date=2017-12-30}}{{cbignore}}</ref>