1. Application in machinery industry
Polymer materials are more and more widely used in the machinery industry. “Plastic instead of steel” and “Plastic instead of iron” have become the hotspot and focus of material science research. This kind of research has broadened the range of material selection, and has transformed mechanical products from the traditional safe and heavy, high-consumption to safe, portable, durable and economical. Such as polyurethane elastomer, the wear resistance of polyurethane elastomer is particularly outstanding. In some organic solvents such as kerosene and mortar mixtures, its abrasion is lower than other materials. Polyurethane elastomers can be made into flotation machine impellers and cover plates, and are widely used in flotation machines where the working conditions are abrasive wear. Another example is polyoxymethylene. Polyoxymethylene has outstanding abrasion resistance, and its wear on metals is smaller than that of nylon. It is modified with polytetrafluoroethylene, engine oil, molybdenum disulfide, chemical lubrication, etc., and its friction coefficient and abrasion are even higher. Because of its good mechanical properties and wear resistance, polyoxymethylene is widely used in the manufacture of various gears, bearings, cams, nuts, various pump bodies, guide rails and other structural parts of mechanical equipment. In the automotive industry, it can replace zinc, copper, aluminum and other non-ferrous metals, as well as cast iron and steel stamping parts.

2. Application in fuel cell
The thickness of the polymer electrolyte membrane will have a great impact on the battery performance, and reducing the thickness of the film can greatly reduce the internal resistance of the battery and obtain a large power output. The macromolecular backbone structure of the perfluorosulfonic acid proton exchange membrane has good mechanical strength and chemical durability. Fluorine compounds have hydrophobic properties and water is easily discharged, but the water retention rate decreases during battery operation, which will affect the electrolyte membrane. Therefore, the reaction gas must be humidified. The humidification technology of the polymer electrolyte membrane ensures the excellent conductivity of the membrane, and also brings about problems such as the increase of the battery size, the complexity of the system, and the management of water in a low-temperature environment. Now a batch of new polymer materials, such as enhanced perfluorosulfonic acid polymer proton exchange membrane, high temperature resistant aromatic heterocyclic sulfonic acid-based polymer electrolyte membrane, nano-scale carbon fiber materials, and other new conductive polymer materials have been obtained. The attention of researchers.

3. Application in modern agricultural seed treatment
Application of polymer materials in modern agricultural seed treatment: A new generation of seed chemical treatment can generally be divided into physical packaging and use of dry and wet polymer film-forming agents to coat seeds. The seed surface coating uses a polymer film-forming agent to coat agricultural drugs and other ingredients on the seed surface. Seed physical granulation mixes seeds and other polymer materials to granulate to improve the appearance and shape of seeds and facilitate mechanical sowing. Progress in the research and development of polymer materials in modern agricultural seed treatment: polymer materials for seed treatment have gradually developed from petroleum-based polymer materials to natural and functional polymer materials. Among the more common and important types of polymer materials include polysaccharide natural polymer materials, polymer materials that maintain good membrane performance at low temperatures, super absorbent materials, temperature-sensitive materials, and comprehensive utilization of natural biological resources. Among them, seed coating agents that use sustainable biological resources concurrently attract attention.

4. Application in the electrical industry
In the electrical and electronic industries, polymers are mainly used as insulation, shielding, conductive, and magnetic materials; in the field of communication, the demand for polymer materials is with the development of society, and polymer materials are not only widely used in various terminal equipment, but also as It is used in the production of high-performance materials such as optical fibers and optical discs. my country is a big country in electrical production, and the entire industry has a large demand for polymer materials. Polymer materials are characterized by light weight, insulation, corrosion resistance, high surface quality and easy forming and processing. This is the best material for the production of various household appliances, and household appliances are essential daily necessities for people. The development of polymer materials in the electrical industry It will not stop.

5. Application in construction engineering
In the current construction projects, there are no high-molecular materials. It can be seen that the high-molecular materials products include drainage pipes, conduits, plastic doors and windows, furniture, sanitary ware, decoration materials and waterproof materials. After the 1970s, the development of low-foaming plastics and other structural materials largely replaced wood, making the use of polymer materials as structural parts in building materials to grow rapidly. At present, the cumulative use of plastic pipes in my country’s construction field is as high as nearly 20 million tons.

6. Application in agriculture
In recent years, new technologies such as mulching, greenhouses, and water-saving irrigation implemented in large areas of my country have increased the demand for polymer materials in agriculture. The use of mulching film can keep warm, moisturizing, fertilizer, moisture, weeding and insect prevention, promoting plant growth, and harvesting in advance, thereby increasing the yield of crops; greenhouses and shading nets should be used to make vegetables and flowers grow in all seasons; polymer materials Lightweight, corrosion-resistant, non-scaling, easy to transport, install and use, it is widely used in modern agricultural irrigation; in addition, ropes, laundry equipment, fishing nets, fish baskets, etc. are also made of polymer materials, which are durable and easy to clean.