A hindered amine polyurethane(PU)/VER materials PU/VER/DZ composite is successfully prepared by mixing N,N-Dicyclohexyl-2-benzothiazole-sulphenamide(DZ)into PU/VER IPNs.The microstructure and damping properties of the composite are characterized by DSC,XRD,SEM and DMA.The results show that the pure DZ is a crystalline material,but in the PU/VER/DZ composite,DZ is a polymorphous material.It is found that it improves the damping properties of PU/VER composite.