HS2339 Week 8 Adhesion Theory 2 Joints and forms of adhesive Flashcards
1
Q
What is adsorption theory- adhesion
A
2
Q
What is the thermodynamic theory side of adhesion
A
the adhesive and substrate both have surface energy, that form an interface, the surface free energy is the work needed to spread the adhesive, to wet the surface.
3
Q
What is the wettability of an adhesive controlled by
A
4
Q
Wetting equilibrium of liquids/ adhesives
A
5
Q
Why don’t some adhesives adhere to some substances
A
6
Q
How does surface tension control capillarity
A
With high surface tensions, you will tend to have difficulty going into capillaries, ie when glueing a slightly porous ceramic.
Also effective for capillary action
7
Q
Practical factors that influence adhesion
A
8
Q
How can we control adhesive kinetics
A
