Polyphenylene sulfide compound material, and preparation method and application thereof

Abstract

The invention relates to a polyphenylene sulfide compound material and a preparation method thereof, and a process for preparing an anticorrosion pump overflowing assembly by using the compound material, and belongs to the technical fields of anticorrosion materials and application of the anticorrosion materials. The compound material mainly comprises the following components in part by mass: 100 parts of polyphenylene sulfide, 40 to 100 parts of reinforcement fibers, 18 to 35 parts of hollow glass microspheres, and 25 to 60 parts of polyamide. The compound material is prepared by a melt cladding method. The anticorrosion pump overflowing assembly is prepared by using the compound material and a compression molding process or an injection molding process. The prepared polyphenylene sulfide compound material has high intensity, toughness, surface hardness, corrosion resistance, and small friction coefficients; and the manufactured overflowing assembly has high intensity, wear resistance and corrosion resistance, and long service life and can be used for high-corrosion using conditions where pumps of other materials cannot be used.

Description

technical field [0001] The invention relates to a polyphenylene sulfide composite material and a preparation method thereof, as well as a process of using the composite material to prepare corrosion-resistant pump flow components, belonging to the technical field of corrosion-resistant materials and applications. Background technique [0002] In some special environments, such as petroleum, chemical, pharmaceutical and other industries, various acidic and alkaline corrosive gases or liquids and organic solvents are very corrosive to cast iron or steel liquid delivery pumps or vacuum pumps, making The pump is easily damaged by corrosion and its service life is shortened. [0003] Various corrosion-resistant materials or corrosion-resistant treatment methods have been used in the industry to manufacture corrosion-resistant pumps, mainly including: directly using stainless steel to manufacture corrosion-resistant pumps, and lining the surface of the pump's cast iron or steel fl...

AI Technical Summary

Problems solved by technology

[0002] In some special environments, such as petroleum, chemical, pharmaceutical and other industries, various acidic and alkaline corrosive gases or liquids and organic solvents are very corrosive to cast iron or steel liquid delivery pumps or vacuum pumps, making The pump is easily corroded and damaged, and its service life is shortened

[0003] Various corrosion-resistant materials or corrosion-resistant treatment methods have been used in the industry to manufacture corrosion-resistant pumps, mainly including: directly using stainless steel to manufacture corrosion-resistant pumps, and lining the surface of the pump's cast iron or steel flow components with ceramics, rubber or Corrosion-resistant plastics such as lined with polytetrafluoroethylene, these methods have undoubtedly greatly improved the corrosion resistance of the pump, but at the same time, they also have their own shortcomings: stainless steel pumps have high raw material prices, high manufacturing costs, and due to poor acid corrosion resistance High, it is still easy to cause corrosion damage to the flow-through components; rubber-lined or plastic-lined pumps, due to the difference in thermal expansion coefficient between the surface lining material and cast iron, can easily cause the surface lining to separate and fall off during the process of heating or cooling; Ceramic pumps or ceramic-lined pumps have insufficient toughness, are easily damaged, and the manufacturing process is too complicated

[0005] Corrosion-resistant plastic pumps can use various engineering plastics according to different usage occasions. Among commonly used engineering plastics, polyamide materials are easy to absorb moisture, resulting in large expansion rate and damp heat aging damage; polypropylene materials have insufficient temperature resistance , deformation and failure when the temperature is slightly higher; high-density polyethylene has poor creep resistance and poor dimensional stability; ultra-high molecular weight polyethylene has excellent wear resistance, but the tensile strength is not high, and the component is under the action of external force for a long time It is prone to deformation caused by creep along the external force, which in turn leads to the destruction of the pump; polyester plastics include PBT and PET, which have relatively high strength, rigidity and hardness, but the service temperature is not high. , easily softened and deformed by heat, and eventually lead to damage; fluoroplastics have excellent corrosion resistance, but their strength is not high, so it is difficult to be used as a pump structural material alone, and generally used as a corrosion-resistant lining for pumps

[0006] Invention patents CN03112595.6 and CN200810237784.4 describe a fiber-reinforced phenolic FRP corrosion-resistant vacuum pump and its manufacturing method. Its flow-through components are made of fiber-reinforced and graphite-filled phenolic resin-based composite materials, molded and pressed as a whole. This method improves the corrosion resistance of the vacuum pump, and there is no problem of liner falling off, but because the phenolic molding compound itself is brittle and has low strength, the bonding resin is easily broken, and the pump impeller is easy to break during use.

[0008] Pure polyphenylene sulfide is a crystalline polymer. Although it has high hardness, it is brittle, has low toughness, and insufficient strength. It needs to be modified before it can be used as a pump material.