What is polyimide?

‌‌Polyimide (PI) is an organic polymer material with the best comprehensive performance. It has the following main characteristics and uses: ‌ ‌

1. High temperature resistance: Polyimide can withstand extremely high temperatures, with a high temperature resistance of more than 400°C, and a long-term use temperature range of -200°C to 300°C. Some varieties have no obvious melting point.

‌2. High insulation performance‌: At 103 Hz, its dielectric constant is 4.0, and the dielectric loss is only 0.004 to 0.007, which belongs to F to H grade insulation materials.

‌3. Multiple classifications‌: According to the chemical structure of the repeating unit, polyimide can be divided into three types: aliphatic, semi-aromatic and aromatic polyimide; according to the interchain interaction force, it can be divided into cross-linked and non-cross-linked types. ‌

4. Wide application‌: As a special engineering material, polyimide has been widely used in aviation, aerospace, microelectronics, nano, liquid crystal, separation membrane, laser and other fields. ‌

5. Thermoplastic polyimide (TPI): TPI is developed on the basis of traditional thermosetting polyimide. It has the characteristics of corrosion resistance, fatigue resistance, damage resistance and impact resistance. The long-term use temperature range is -269°C to 280°C, and the thermal decomposition temperature can reach up to 600°C. ‌

6. Reactive polyimide: Also known as PMR polyimide, it is a high-performance composite material matrix resin with excellent comprehensive performance.

In summary, polyimide is known as the "top material of the polymer material pyramid" and "problem solver" due to its excellent performance and wide application fields.