Method for passivating end group of fluoroelastomer

The invention provides a fluoroelastomer end group passivation method, which is applied to the technical field of fluoroelastomers, and comprises the following steps: S1, carrying out devolatilization treatment on a fluoroelastomer by using a liquid or a supercritical fluid; s2, the devolatilized fluoroelastomer is subjected to passivation treatment, and a passivation medium is removed; and S3, washing the fluoroelastomer with deionized water, dehydrating, and drying to obtain the devolatilized and passivated fluoroelastomer. The fluoroelastomer is passivated after liquid or supercritical fluid devolatilization, the obtained fluoroelastomer is less in volatile component, the end group passivation degree or the end group stabilization degree is controlled and adjusted by controlling the passivation medium concentration and the passivation time, and the passivated fluoroelastomer has excellent processability and storage stability and is suitable for large-scale production. In the subsequent processing and using