Palygorskite silane crosslinking agent preparation method and application of palygorskite silane crosslinking agent in low-density polyethylene crosslinking

The invention provides a palygorskite silane crosslinking agent preparation method and belongs to the field of high polymer materials. The method includes: dispersing activated palygorskite in an ethyl alcohol-water mixed solution, ultrasonic dispersing, adding an acidulated silane crosslinking agent, stirring, centrifuging, drying, conducting soxhlet extraction in a xylene solution, drying and grinding to obtain the palygorskite stem grafting  silane crosslinking agent. Infrared absorption spectrum and scanning electron microscope analysis shows that the silane crosslinking agent is grafted on the surface of palygorskite clay, and a part of activated crosslinking group is reserved. Compared with vinyl trimethoxy silane of a common crosslinking agent of density polyethylene, under the condition of the same adding quantity and same processing technology, the palygorskite silane crosslinking agent  is applied to crosslinking of the low-density polyethylene, and the mechanical property and gel content of the low-density polyethylene are improved. Meanwhile, combustion performance and thermal stability of a low-density polyethylene material are improved, the cost of the low-density polyethylene material is reduced, and the palygorskite
silane crosslinking agent preparation method and the application have good application prospects.