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.
Read more about this topic: Adhesion
Famous quotes containing the word strength:
“He has his health, and ampler strength indeed
Than most have of his age.”
—William Shakespeare (1564–1616)
“The most successful career must show a waste of strength that might have removed mountains, and the most unsuccessful is not that of the man who is taken unprepared, but of him who has prepared and is never taken. On a tragedy of that kind our national morality is duly silent.”
—E.M. (Edward Morgan)
“Old age is not a disease—it is strength and survivorship, triumph over all kinds of vicissitudes and disappointments, trials and illnesses.”
—Maggie Kuhn (b. 1905)