High-performance polyurethane damping material containing dynamic disulfide bonds and preparation method thereof

The invention relates to the technical field of high polymer materials, and particularly discloses a high-performance polyurethane damping material containing dynamic disulfide bonds and a preparation method of the high-performance polyurethane damping material. The polyurethane damping material is prepared from raw materials including a polyurethane prepolymer and a combined chain extender; the polyurethane prepolymer comprises a soft segment component and a hard segment component, and the soft segment component comprises hydroxyl-terminated polybutadiene-acrylonitrile and polyethylene glycol adipate propylene glycol ester; the component of the hard segment is toluene diisocynate; the preparation method comprises the following steps: by taking a polyurethane prepolymer as a matrix, dropwise adding an N 'N-dimethylformamide solution containing a double-disulfide-bond chain extender into the matrix, reacting to obtain a yellow primary chain extension product, then adding trimethylolpropane and neopentyl glycol