Analysis of the Role of Crosslinking Reagents
Crosslinking reagent, also called curing reagent, curing reagent or hardener, is mainly used in polymer materials, such as various rubbers or resins, to improve the strength, heat resistance, wear resistance and other properties of rubber. Crosslinking reagent can maintain stable performance at normal temperatures, so it can be stored at room temperature for a long time. Most common crosslinking reagents in industry are organic peroxides, such as diphenyl peroxide, benzoyl peroxide, diisopropyl benzene peroxide, etc. Different crosslinking reagents have different shapes, melting points and effects. Next, we will introduce the function of crosslinking reagents in various molecular materials.
Crosslinking of thermoplastic materials such as polyethylene, polystyrene, and polyvinyl chloride
For thermoplastic materials, adding 1%~3% ofcrosslinking reagent can significantly improve the heat resistance, flame retardancy, mechanical strength and other properties of the product through crosslinking.
Compared with not using crosslinking reagents, the quality of products after use is higher, and there is no change in the shape or taste of the product itself.
Crosslinking of special rubbers such as EPDM, fluororubber and CPE
The amount of crosslinking reagents used in various special rubbers is generally between 0.5% and 4%. It can accelerate the vulcanization speed of products and also play a role in improving strength, wear resistance and corrosion resistance.
Crosslinking of acrylic acid, ethylene and other resins
For this type of resin, adding a small amount of crosslinking reagents can significantly improve the quality of the product and produce a new type of ion exchange resin product with excellent properties in all aspects.
Crosslinking of polyacrylic ester and polyalkyl acrylic ester
Adding a certain amount of crosslinking reagents to these products can improve the optical performance, heat resistance and processing performance of the product. It can also be used in the modification of ordinary Plexiglass.
Crosslinking of epoxy resin and DAP resin
Using crosslinking reagents in epoxy sealing and packaging materials can improve their heat resistance, adhesion, mechanical size and product stability.
Crosslinking of unsaturated polyester and thermoplastic polyester
After using crosslinking reagents in these products, the major effect is to improve the maximum product operating temperature, which can be up to 180℃ or higher.
Crosslinking reagents can be used as protective reagents for metal heat resistance, radiation resistance and weather resistance
When manufacturing electronic product circuit boards or insulation materials, adding crosslinking reagents can provide good protection for the product's radiation resistance, insulation performance and heat resistance.
Above is a complete list of the functions of crosslinking reagents that we have compiled for everyone. Through the above introduction, it can be concluded that the use of crosslinking reagents varies in each polymer material, such as rubber, plastic, and resin, so the effect it produces is also different.
However, overall, after crosslinking, the mechanical and thermal properties of products can be greatly improved. When using crosslinking reagents, attention should also be paid to some issues, such as avoiding adding acidic fillers as much as possible, and the addition of antioxidants may also have adverse effects.
