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Polyphenylene sulfide (PPS)

Polyphenylene sulfide is a crystalline polymer with extremely high thermal stability and chemical stability. It can work stably for a long time in a high-temperature environment above 200°C and has good mechanical properties and electrical insulation properties. The main application areas of PPS include electronics, automobiles, aerospace, etc. In the field of electronics, PPS is often used to manufacture connectors, switches, relays and other parts; in the automotive field, it can be used to manufacture engine peripheral parts, fuel system parts, etc.; in the aerospace field, PPS is widely used to manufacture high-temperature resistant structural parts and functional parts.

The excellent performance of PPS comes from its unique molecular structure. Its molecular chain contains a large number of benzene rings and sulfur atoms, which give it the characteristics of high melting point, high strength, and high rigidity. In addition, PPS also has good chemical corrosion resistance and can resist the erosion of most chemicals such as acids, alkalis, and salts. However, PPS also has some shortcomings, such as greater brittleness and higher processing difficulty. In order to overcome these shortcomings, it is usually necessary to modify it, such as adding toughening agents, improving processing technology, etc.

Polyimide (PI)

Polyimide is a polymer with excellent high-temperature resistance. It can be used for a long time in a high temperature environment above 300℃, and can even withstand high temperatures up to 500℃ in a short time. PI is not only resistant to high temperatures but also has excellent mechanical properties, electrical insulation properties and chemical corrosion resistance. It has a wide range of applications in aerospace, electronics, chemical, and other fields.

In the aerospace field, PI is often used to manufacture high-temperature structural parts, thermal insulation materials, sealing materials, etc.; in the electronics field, PI can be used to make printed circuit boards, electronic packaging materials, etc.; in the chemical field, PI can be used to make corrosion-resistant pipes and containers. The high performance of PI comes from its unique molecular structure. The imide group in the molecular chain gives it excellent high temperature resistance and chemical corrosion resistance. At the same time, PI can also adjust its performance through different synthesis methods and modification methods to meet the needs of different fields.

Although PI has many excellent properties, it also has some disadvantages, such as high cost and difficult processing. This limits its large-scale application in some fields. However, with the continuous advancement of technology and the gradual reduction of costs, the application prospects of PI will become more and more broad.

Polyetheretherketone (PEEK)

Polyetheretherketone is a high-performance thermoplastic with extremely high-temperature resistance and mechanical strength. Its continuous use temperature can reach 260°C, and the instantaneous use temperature can even exceed 300°C. PEEK also has good chemical corrosion resistance, wear resistance, and electrical insulation properties.

PEEK has important applications in the medical field, such as for the manufacture of artificial bones, joints, and other medical devices; in the aerospace field, it can be used to manufacture aircraft parts; in the automotive field, it is used to manufacture high-performance parts. The excellent performance of PEEK makes it an ideal material for replacing metals, which can not only reduce weight but also improve the performance and reliability of components.

The preparation process of PEEK is relatively complex and the cost is relatively high. However, with the development of technology and the expansion of production scale, its cost is expected to gradually decrease. At the same time, researchers are also constantly exploring new modification methods and application fields to further give play to the advantages of PEEK.

Polybenzimidazole (PBI)

Polybenzimidazole is an ultra-high temperature resistant engineering plastic with special properties. It can remain stable at very high temperatures, and the long-term use temperature can reach about 370℃. PBI has excellent thermal stability, mechanical strength, and chemical corrosion resistance.

PBI performs well in some applications with extremely high temperatures and harsh chemical environments. For example, in some special chemical equipment, PBI can be used as a material for key components; in some high-temperature fuel cells, PBI is also used to manufacture key components. The synthesis of PBI is difficult, which also leads to its high price. However, due to its unique properties, it is still indispensable in some fields with extremely high-performance requirements.

In order to better play the advantages of PBI, researchers are also constantly exploring new application pathways and modification methods to improve its performance and reduce costs, and further expand its application range.

Polyarylsulfone (PASF)

Polyarylsulfone is an engineering plastic with excellent high temperature resistance and mechanical properties. Its long-term use temperature can reach about 200℃, and it has good chemical corrosion resistance and dimensional stability.

PASF has certain applications in the fields of electronics, automobiles, aerospace, etc. In the field of electronics, it can be used to manufacture high-temperature resistant insulation materials and structural parts; in the automotive field, it can be used to manufacture engine peripheral parts, etc. The performance characteristics of PASF make it an important engineering plastic, providing a reliable solution for many applications in high-temperature and harsh environments.

However, PASF also faces some challenges, such as high cost and difficult processing. In order to better promote and apply it, it is necessary to further optimize its production process and reduce costs. At the same time, it is also necessary to continuously innovate technology and expand applications to give full play to its advantages and potential.

Summary

In short, these five ultra-high temperature-resistant engineering plastics have their own characteristics and play an important role in different fields. With the continuous advancement of science and technology and the continuous growth of application needs, their application prospects will be broader, providing strong support for the development of various industries.