10 Questions
What is the relationship between contact angle and adhesion forces?
Contact angle must be zero or less than 90° for strong adhesion between adherend and adhesive
What is the primary cause of surface energy in solids?
Unequal attraction of the outermost atoms in all directions
How does temperature affect the surface tension of liquids?
Increasing temperature decreases surface tension
What is the primary way that liquids try to decrease their surface tension?
By minimizing their surface area
How does the surface energy of the adherend (solid surface) affect wettability?
Increasing the surface energy of the adherend increases wettability
What is the primary reason for the increased surface energy in solids compared to the interior?
The outermost atoms in solids are not equally attracted in all directions
How does the surface tension of the adhesive affect wettability?
Increasing the surface tension of the adhesive decreases wettability
What is the primary way that solids try to reduce their surface energy?
By adsorbing atoms or molecules onto their surface
How does the surface tension of liquids differ from the surface energy of solids?
Surface tension is a property of liquids, while surface energy is a property of solids
What is the relationship between surface energy, surface area, and adhesion in solids?
Increasing the surface area of a solid increases its surface energy, which increases adhesion
Test your knowledge on the concept of chemical adhesion in dentistry, where bonding occurs through a chemical reaction between atoms and molecules. Explore examples like glass ionomer and zinc polycarboxylate bonding with the tooth through COOH groups reacting with calcium.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
