[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of polyphenylene sulfide, the nature, use, upstream and downstream raw materials, storage methods.

Properties of polyphenylene sulfide

Polyphenylene sulfide (PPS) is an engineering plastic with excellent thermal and mechanical properties. Its chemical structure is mainly composed of benzene ring and sulfur atom, which makes it have high melting point and excellent thermal stability. PPS has a melting point of about 280 ° C. and can maintain a stable form in a high temperature environment. PPS also exhibits excellent chemical resistance and is resistant to most acids, alkalis and organic solvents. The mechanical properties of this material are also excellent, including high strength, high rigidity and good dimensional stability, and can be used for a long time in harsh mechanical environments.

Polyphenylene sulfide use

Thanks to its unique properties, PPS has a wide range of applications in many fields. The electronic and electrical field is one of the main application markets of PPS. Due to its excellent electrical insulation and thermal stability, PPS is often used in the manufacture of electrical connectors, sockets and switches. PPS is also widely used in the automotive industry, mainly for the manufacture of fuel system components, engine cover and exhaust system components, etc., because it can work at high temperatures and harsh chemical environments. Other applications include home appliance manufacturing, industrial machinery and medical equipment.

Upstream raw materials

The main raw materials for the production of PPS include sulfide and dichlorobenzene. Dichlorobenzene is a key monomer in the production of PPS, which is usually obtained by the process of chlorinating benzene. Sulfides can be obtained in a variety of ways, including sulfur and sodium sulfide. The process of synthesizing PPS mainly uses polycondensation reaction, which reacts dichlorobenzene and sulfide under high temperature and high pressure to produce polymer. In the production process, the reaction conditions need to be strictly controlled to ensure that the molecular weight and molecular structure of PPS meet the expected requirements, so as to ensure the performance of the final product.

Downstream Products

PPS has a wide range of downstream products, including various mechanical components, electronic and electrical parts and auto parts. Specifically, PPS can be processed into films, fibers, pipes and injection molded parts of various complex shapes for different industrial fields. For example, in the field of electrical and electronic, films made of PPS can be used as insulating layers for capacitors; in the automotive industry, pipes made of PPS can be used as fuel pipes; and in industrial machinery, gears and bearings made of PPS can be used in high temperature and high load environments.

storage method

The storage method of PPS is critical to its performance retention. Since PPS is sensitive to moisture, contact with moisture should be avoided during storage. It is recommended that PPS be stored in a dry, cool environment and packaged in a sealed container to prevent moisture absorption. The temperature and humidity of the storage environment should be kept stable to avoid drastic temperature changes. PPS should be kept away from fire and heat sources to prevent material deterioration due to high temperature. For long-term storage, it is necessary to regularly check the state of the packaging and materials to ensure that their performance is not affected.

PPS Market Prospects

With the development of industry and technology, the demand for high-performance materials is increasing, and the market prospect of PPS is widely optimistic. Especially in the field of electronic and electrical and automotive industry, the demand for high temperature and chemical corrosion resistant materials is increasing, which promotes the market demand of PPS. With the improvement of environmental awareness and the strict implementation of laws and regulations, the application of PPS, an environmentally friendly engineering plastic, will be further expanded. In the future, with the improvement of production processes and the development of new applications, the market share of PPS is expected to continue to rise.

Conclusion

Polyphenylene sulfide has become an important material in the field of engineering plastics due to its excellent thermal properties, mechanical properties and chemical resistance. Its wide range of applications and good market prospects make it an important position in many industrial fields. With the continuous advancement of technology and the continuous increase of market demand, the application of PPS will be further expanded and become a key role in the field of high-performance materials.