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[Chemical Knowledge]：What plastic high temperature? Different plastic materials high temperature performance competition

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With the continuous development of modern science and technology, people's requirements for high-temperature materials are getting higher and higher. In the process of industrial manufacturing and scientific research, high temperature resistance has become an important indicator of the performance of plastic materials. Next, let us explore the high temperature performance of different plastic materials.

1. Polystyrene (PS)

Polystyrene (PS) is a commonly used plastic material in daily life and is a relatively fragile material. Under high temperature conditions, PS will melt and soften, and will decompose at 210 ℃, so its high temperature performance is relatively poor.

2. Polycarbonate (PC)

Polycarbonate (PC) is a relatively common plastic material, which is characterized by high strength and good rigidity. In high temperature environment, due to the special nature of its molecular chain structure, it can maintain stable performance up to 150 ℃. However, when the temperature exceeds the maximum temperature that can be tolerated, the polycarbonate will also soften and melt.

3. Nylon (PA)

Nylon (PA) is a relatively heat-resistant plastic material, its melting point can reach about 260 ℃, and has good insulation and chemical resistance. However, when used in a high temperature environment for a long time, softening, burning and other phenomena will still occur, so special attention should be paid to the use under high temperature conditions.

4. Polyurethane (PU)

Polyurethane (PU) is a kind of polymer material with strong heat resistance. Its thermal stability, heat resistance and wear resistance are very excellent. In the high temperature environment, its tensile strength, elastic modulus and other properties will not change significantly, and in the extreme hot environment can still maintain its overall structure is not deformed.

5. Polyimide (PAI)

Polyimide (PAI) is a kind of engineering plastic material with excellent performance, and its high temperature resistance is one of the top of all plastics. The high strength, rigidity, toughness and other properties of the material can still be maintained under the high temperature environment of about 350 ℃, and it will not fail for a long time, so the demand for use under high temperature conditions is very large. In aviation, automotive, electronics and other fields have a wide range of applications. Summary of

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, polyimide (PAI) is the best plastic material with high temperature resistance, and it is also the most commonly used engineering plastic material. The performance of other plastic materials in high temperature environment is different, so it is necessary to make reasonable selection and collocation in different application scenarios. In the process of production and use, it is also necessary to strictly control the temperature and duration of the high temperature environment to ensure the stability and high reliability of the plastic material.