Study on Crosslinking of Silane PE

Due to structural reasons, polyethylene cannot withstand higher operating temperatures, coupled with its low mechanical strength, which limits its application in many fields. In order to improve the heat resistance and mechanical properties of polyethylene, an effective method is chemical crosslinking modification. The chemical cross-linking of polyethylene is to form chemical bonds between its macromolecular chains (bonded together through main valence bonds or side chain groups) to replace the original van der Waals force, and the polyethylene molecule becomes a three-dimensional thermoset structure. , The relative slippage between molecules is greatly weakened. Under the action of external force, polyethylene can only cause elastic deformation, which greatly improves its thermal deformation and other properties. In recent years, domestic research reports on cross-linked polyethylene have gradually increased. There are three main methods for crosslinking polyethylene in industry: radiation, peroxide, and silane grafting and crosslinking. Because the equipment is extremely expensive, the radiation cross-linking method is greatly restricted, and the peroxide cross-linking process is not easy to control, and the quality of the product is more difficult to guarantee. Therefore, the research direction of people has gradually turned to the silane grafting cross-linking technology.