Heat-resistant cross-linked high-density polyethylene pipe

Abstract

The invention discloses a heat-resistant cross-linked high-density polyethylene pipe. The pipe is prepared from the following raw materials: high-density polyethylene, polybutadiene, 3methacryloyloxytrimethoxysilane, montmorillonite powder, an ethylene-vinyl acetate copolymer, a styrene-maleic anhydride copolymer, an olefin processing mixed additive, a lubricant, a cross-linking agent, an assistant cross-linking agent, polycarbosilane, N-ethyl-o-toluenesulfonamide, 4,4'-diaminodiphenyl sulfone, an ethylene-octene copolymer, cobalt sesquioxide, resorcinol and cordierite powder. According to theheat-resistant cross-linked high-density polyethylene pipe disclosed by the invention, the heat resistance and the creep resistance are improved, meanwhile, the ageing resistance, the mechanical property, the transparency and the like of the pipe are obviously improved, and if the crosslinking degree is improved, the improvement of the properties is more obvious. Meanwhile, the pipe has better chemical corrosion resistance and flexibility.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a heat-resistant cross-linked high-density polyethylene pipe. Background technique [0002] Cross-linked polyethylene pipe is regarded as a new generation of green pipe due to its good hygiene and comprehensive mechanical and physical properties. The main raw material for the production of cross-linked polyethylene pipes is HDPE, and additives such as initiators, cross-linking agents, and catalysts. At present, common polyethylene raw materials are commonly used to add silane grafting materials to form chemical covalent bonds between polymer macromolecular chains. To replace the original van der Waals force, thus forming a three-dimensional chain network structure of cross-linked polyethylene, the degree of cross-linking can reach 60-89%, so that it has excellent physical and chemical properties. Polyethylene is a polymer resin with a linear polymer structu...

AI Technical Summary

Problems solved by technology

However, this product contains carbon black and ethylene / acetate copolymer in the raw materials, but the added ethylene / acetate copolymer and carbon black substances will have a certain cross-linking reaction during the extrusion process, resulting in a higher viscosity Substances that have a retarding effect on the extrusion speed and affect the efficiency of extrusion; carbon black will also reduce some application properties of the pipe

It has a technical disadvantage that while obtaining good mechanical properties, etc., it loses good processing properties