1. The difference between coupling agents and cross-linking agents
Cross-linking agentUsually refers to a resin that participates in the cross-linking reaction to connect the active functional groups in the resin to create a network structure. Chemical additives. The cross-linking agent can mainly improve the viscosity and elasticity of the working fluid. At the same time, it should also have certain characteristics such as temperature resistance and salt resistance according to the geological characteristics of the reservoir.
Using a small amount of coupling agent can improve the reactivity of organic and hydrolyzable groups and the reactivity of carbon groups on the surface of organic materials. Fixing, that is to say, it can form a bridge between the resin and the interface, increasing the adhesion of coatings and adhesives.
The difference between the two is not very big. The coupling agent is a substance with two different functional groups. Some of the functional groups in their molecules can react with adsorbed water or hydroxyl groups on the surface of inorganic substances, and some of the functional groups can react with organic molecules to form adhesion or coupling. Cross-linking agents are not much different from bridging agents. They can cross-link linear molecules into a network structure.
Cross-linking agents are mainly used in polymer materials, because the molecular structure of polymer materials is like long lines. When not cross-linked, the strength is low, easy to break, and has no elasticity. The function of the cross-linking agent is to generate chemical bonds between linear molecules, so that the linear molecules are connected to each other to form a network structure, thus improving the strength and elasticity of the rubber. .
2. The difference between coupling agents and compatibilizers:
Both can be called surfactants, but their uses are different.
1. The compatibilizer is used to improve the blending of polymers, that is, two different polymer alloys. The compatibility between resins is usually achieved by reactive extrusion-produced polyolefin grafts such as maleic anhydride and GMA, as well as synthetic polar polymers.
2. Coupling agents are mainly used between inorganic and organic materials to improve the phase between fillers and resin molecular chains. Capacitive, high filler dispersion in resin, such as silane, aluminate, titanate coupling agents;
