Abstract
Fluorosilicone rubber has excellent high temperature oil resistance and has been widely used in high temperature oil media. The performance of fluorosilicone rubber will degrade with the length of oil immersion time. In this paper, through oil resistance test, hardness test, tensile test, infrared analysis, differential scanning calorimetry analysis and thermal weight loss analysis, the performance, structure and composition changes of fluorosilicone rubber FS6265 at 150°C and RP3 kerosene soaking process are studied. The results show that in 150°C, RP3 kerosene, the mass and volume of fluorosilicone rubber FS 6265 first increase and then decrease. The hardness and tensile strength gradually decrease with the increase of immersion time, the elongation at break tends to increase slightly and then decrease. The performance changes are mainly caused by swelling, filler migration, side chain rupture and cross-linking damage. The swelling in the early stage of immersion plays a major role, and the filler migration, side chain and cross-linking failure play a major role in the later stage.
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