Flame-retardant polyvinyl chloride plastic pipe and preparation method thereof

Abstract

The invention discloses a flame-retardant polyvinyl chloride plastic pipe which consists of the following raw materials in parts by weight: 0.6-1 part of 2-thiol benzimidazole, 3-5 parts of triethylene glycol di-2-ethylhexoate, 1-2 parts of molybdenum disulfide, 3-4 parts of a carbon nano tube, 40-60 parts of 90-93 percent of sulfuric acid, 60-70 parts of 95-97 percent of nitric acid, 1-2 parts of acryloyl chloride, 0.01-0.02 part of 1,4-dioxane, 0.2-0.3 part of azodiisobutyronitrile, 6-10 parts of hydroxyethyl acrylate, 7-8 parts of triethylamine, 10-14 parts of liquid ethylene-propylene-diene monomer rubber, 1-1.2 parts of dicumyl peroxide, 100-120 parts of polyvinyl chloride, 2-3 parts of decabromodiphenyl ether, 0.1-0.2 part of butylmercaptooxo stannane, 1-2 parts of calcium aluminate, 0.1-0.2 part of polysorbate 80, 2-4 parts of ammonium polyphosphate, 10-15 parts of talcum powder and 2-3 parts of hydrated zinc borate. According to the invention, the fire resistance and the flame resistance of the finished plastic pipe are improved, and the service safety of finished products is improved.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to a flame-retardant polyvinyl chloride plastic pipe and a preparation method thereof. Background technique [0002] Carbon nanotubes have strong axial strength, toughness and elastic modulus. After theoretical calculations, it is concluded that the Young's modulus of carbon nanotubes can reach 5TPa, which is an order of magnitude higher than that of ordinary fibers; its theoretical tensile strength is 50- 20OGPa, which is 100 times that of steel, but the density is only one-sixth of steel. In addition, the hollow cage-like structure of carbon nanotubes can undergo a certain volume deformation when subjected to strong external forces, and then shows good flexibility. It can be regarded as a very excellent fiber, and the tension and strain of carbon nanotubes will not show brittle fracture, plastic deformation fracture or bond fracture, so the structure of carbon nanotubes is stronger ...

AI Technical Summary

Problems solved by technology

[0004] Since carbon nanotubes can improve the mechanical properties, electrical properties and other properties of composite materials, carbon nanotube / rubber composites have attracted more and more attention. In order to achieve the purpose of strengthening, there are two problems to be solved: one is Dispersion of carbon nanotubes, another problem is the interface between carbon nanotubes and the matrix. Since the surface of carbon nanotubes is relatively inert, and the specific surface area is relatively large, it is easy to cause agglomeration, so the effect of carbon nanotubes reinforced polymers is not very obvious. Based on For this reason, many people began to treat carbon nanotubes physically or chemically. Among these methods, the method of acid treatment to generate oxygen-containing groups is a common and efficient method, because it can provide effective reaction sites, so as to interact with the matrix. Resin achieves chemical bond connection, but, in most cases, this method often produces very few groups, which cannot provide enough connection and matrix bonding;