Author: Site Editor Publish Time: 2024-04-05 Origin: Site
Ⅰ. Basic concepts
1. Adhesion: A state in which two surfaces are bonded together by chemical force, physical force, or both. Synonyms: adhesion.
2. Cohesion: The state in which the particles within a single substance are held together by primary valence forces and secondary valence forces.
3. Mechanical adhesion: The combination of two surfaces through the bite of adhesive. Synonyms: mechanical adhesion.
4. Adhesion failure (adhesive failure; adhesion failure): The visually visible damage phenomenon that occurs at the interface between the adhesive and the adherend.
5. Cohesive failure (cohesive failure; cohesion failure): a visually visible damage phenomenon that occurs in adhesives or adherends.
6. Compatibility: The ability of two or more substances to be compatible with each other when mixed.
7. Adhesive: A substance that can bind adherends together through adhesion.
8. Adherent: The object to be bonded or the objects on both sides of the adhesive layer after bonding.
9. Substrate: The material used to coat adhesive on the surface. Note: This is a broader term than "adherent."
10. Wetting: The affinity of liquid to solid. The smaller the contact angle between the two, the easier it is for the solid surface to be wetted by the liquid. Synonyms: moistening
11. Dry: The process of reducing the solvent or dispersion medium through evaporation and absorption to change the physical state of the adhesive on the adherend.
12. Bond: Use adhesive to connect the surfaces of adherends together. Synonyms: bonding
13. Curing cure: The process in which adhesives obtain and improve properties such as bonding strength through chemical reactions (polymerization, cross-linking, etc.).
14. Hardening (setting set): The adhesive obtains and improves the bonding strength through chemical reactions or physical effects (such as polymerization reaction, oxidation reaction, gelation, hydration, cooling, evaporation of volatile components, etc.). The process of cohesive strength and other properties.
15. Adhesive layer: The adhesive layer in the adhesive joint.
16. Cross-linking (crosslink): The process of forming chemical bonds between molecules and creating a three-dimensional network structure.
17. Delamination: In laminates, the phenomenon of interlayer separation caused by damage to adhesives, adherends or their interfaces.
18. Squeeze-out: The adhesive squeezed out from the adhesive layer after pressurizing the assembly.
19. Blocking: An undesirable adhesion phenomenon between materials
20. Dry tack aggressive tack: a characteristic of certain adhesives (especially non-vulcanized rubber adhesives). When the volatile components in the adhesive evaporate to a certain extent, they will stick to each other when they come into contact and appear to be dry to the touch.
21. Fillet: The part of adhesive filled at the intersection of two adherends (such as the adhesive fillet formed at the end of the sandwich when the honeycomb sandwich is bonded to the surface material).
22. Degree of cure: The degree of chemical reaction characterized by the curing of the adhesive.
23. Aging: The phenomenon that the performance of adhesive joints changes with time.
24. Tack: The adhesive has the property of forming a considerable bonding strength immediately after contact with the adherend by applying slight pressure.
