What Changes Will Happen To The Ambient Temperature Radiation Of Fluororubber in The Air

Fluoroelastomer in air radiates at room temperature at 5 × At a dose of 107 rem, the performance changes dramatically at 1 × At 107 roentgen, the hardness increases by 1 to 3 degrees, the strength decreases by less than 20%, and the elongation decreases by 30% to 50%. Therefore, it is generally believed that 246 fluororubber can withstand 1 × 107 lun, fluorine rubber O-ring limit is 5 × 107 lun fluororubber has excellent physical and mechanical properties. The strength of type 26 fluororubber is generally between 10 and 20 MPa, the elongation at break is between 150 and 350%, and the tear resistance is between 3 and 4 KN/m.

1. The strength of fluororubber is between 15.0 and 25MPa, the elongation is between 200% and 600%, and the tear resistance is between 2 and 7MPa. Generally, the compression set of fluororubber at high temperatures is large, but if compared under the same conditions, the compression set of fluororubber O-ring at 150 ℃ for the same time is larger for both neoprene and neoprene than for 26 fluororubber, which is at 200 ℃ × The compression deformation at 24 hours is equivalent to that of butadiene rubber at 150 ℃ × Compression deformation for 24 hours.

2. Fluororubber also has good electrical properties, and its moisture absorption is lower than other elastomers. It can be used as a good electrical insulation material at low frequencies and low voltages. Fluorine rubber has a relatively high solubility in gases, but its diffusion rate is relatively small. Therefore, the overall air permeability of the fluorine rubber O-ring is also small. The permeability of fluororubber to oxygen, nitrogen, helium, and carbon dioxide gases at 30 ℃ is comparable to that of butyl rubber and neoprene, but better than that of neoprene and natural rubber.