What are the nine major properties of polyimide (PI)?
Nine major properties of polyimide (PI)
Thermal stability: decomposition temperature from 500 ° C to 600 ° C
Mechanical properties: The tensile strength is generally 100MPa
Dielectric performance: The dielectric constant is usually around 3.4, and the dielectric strength is 150-300kV/mm
Cold resistance: Polyimides with special structures do not undergo brittle cracking in liquid nitrogen environments at -269 ° C
Chemical stability: Ordinary PI has strong acid resistance, while some PIs are almost insoluble in all organic solvents and resistant to hydrolysis
Low thermal expansion coefficient: The thermal expansion coefficient of ordinary PI varieties is between 40-50ppm/° C, and that of biphenyl polyimide is even higher
Radiation resistance: After being exposed to a large amount of radiation, PI can still maintain its own strength above 90%
Self extinguishing: PI belongs to self extinguishing polymer materials, which can automatically extinguish when burned in the air and have a low smoke emission rate
Non toxicity: PI can be used as a material for plastic tableware, trays, medical equipment, and even human organs
