Classification of polymer damping materials
Damping materials are divided into five categories according to their characteristics:
① Rubber and plastic damping plate: used as sandwich material. Butyl, acrylate, polysulfide, nitrile and silicone rubber, polyurethane, PVC and epoxy resin are widely used. This kind of material can meet the use requirements in the range of - 50-200 ° C.
Rubber and foam plastics: used as damping sound absorbing materials. Butyl rubber and polyurethane foam are widely used to achieve sound absorption in order to control the size of pores, through holes or closed pores.
③ Damping composite: used for vibration and noise control. It uses the first two kinds of materials as the damping sandwich layer, and then combines them with metal or non-metal structural materials to form various sandwich structural plates, beams and other profiles, which are machined into various structural parts.
④ High damping alloy: the damping property is basically stable in a wide range of temperature and frequency. Copper zinc aluminum alloy, iron chromium molybdenum alloy and manganese copper alloy are widely used.
⑤ Damping coating: the damping coating is made up of polymer resin added with appropriate fillers and auxiliary materials. It can be applied on the surface of various metal plate structures, with damping, heat insulation and certain sealing properties. It includes constrained damping coating and water-based damping coating.