The difference between coupling agents and cross-linking agents.

Cross-linking agents are generally a class of chemicals that participate in the cross-linking reaction of a resin, causing the active functional groups in the resin to interlink and create a network structure. Cross-linking agents mainly improve the viscosity and elasticity of the working fluid and, depending on the geological characteristics of the reservoir, should also have certain characteristics such as temperature and salt resistance. In addition, some additives are added to improve the overall performance of the working fluid.
Coupling agent is generally a small molecule chemical containing three or more hydrolyzable carbon functional groups. A small amount of coupling agent is used to improve the bonding of organic and inorganic substances and to improve the reactivity of hydrolyzable groups and the immobilisation of carbon groups on the surface of organic substances, that is, he can form a bridge between the resin and the interface and increase the adhesion of coatings and adhesives with a small amount.

There is little difference between the two. Coupling agents are a class of substances with two different functional groups. Some of the functional groups in their molecules can adsorb water or react with hydroxyl groups on the surface of inorganic substances, and some of the functional groups can react with organic molecules to form bonds or couplings. Cross-linking agents are not very different from bridging agents, they can make linear molecules cross-link each other into a network structure.

Cross-linking agents are mainly used for polymer materials, because the molecular structure of polymer materials is like a long line, no cross-linking when the strength is low, easy to pull off, and no elasticity, the role of cross-linking agents is to make a chemical bond between linear molecules, so that linear molecules are linked together to form a network structure, thereby improving the strength and elasticity of rubber, rubber with cross-linking agents are mainly sulphur, in addition to accelerators.

The difference between a coupling agent and a compatibiliser.

In a sense, they are both surfactants with different uses.

Coupling agents are mainly used between inorganic and organic and their main function is to improve the compatibility between the molecular chains of fillers and resins and to improve the dispersion of fillers in resins, such as silane and titanate coupling agents.

Coupling agents are used to improve compatibility between mixed polymers, i.e. polymer alloys between two different resins, usually produced by reactive extrusion of polyolefins grafted with maleic anhydride, a reactive graft like GMA, which can also synthesise polar polymers.

Duration of effectiveness of the coupling agent.

The environment in which the coupling agent is used, such as humidity, storage time, ink and paint formulation and ph value. Most titanates and silanes are weakly basic and hydrophilic decomposing into alcohols, they are less effective in the humid and rainy season in the south and dry for longer periods in the north, the spray interface should also be tested for weak acidity or acidity. The common ones are KH (silane), A (titanate) and N (azo) series, they react to water, alcohols, ethers, ammonia, amines and acids and lose their coupling ability after the reaction They react to water, alcohols, ethers, ammonia, amines and acids and lose their coupling ability after the reaction.