Study on Properties of Aging and Immersion in Boric Acid Water of PEEK Insulation Material

Because of its excellent heat resistance, nuclear radiation resistance, corrosion resistance and high mechanical properties, PEEK is considered as a promising insulating material in the 21st century, but at present, there is still no research on the mechanical property changes after immersion in boric acid water and aging. This paper has deeply studied the above problems through experiments, the test results show that the PEEK material will not crack or break in the air under high stress levels, however, long-term immersion in boric acid solution may lead to complete separation of the two pieces. Soaking in hot water can increase the IS of the PEEK material, so in order to prevent fracture and improve the toughness of the material, the PEEK material may be soaked in hot water for a certain amount of time, and ensure that the sum of preloading force and acting force when the material is used is lower than the allowable stress value after immersion reduction, then can be used.