Wave Absorbing Characteristics of a New Kind of Water-borne Polyurethane Foam

• 1、Department of Materials Science and Engineering, China University of Ming and Technology, Beijing 100083
• 2、Department of Materials Science and Engineering, China University of Ming and Technology, Beijing, 100083

Abstract：According to the absorbing mechanism of absorbing materials, conductive carbon black can be used as absorbing agent which will be added into the polyurethane foam. Mixing the aqueous polyurethane with modified conductive carbon black can prepare waterborne polyurethane coating and put the closed radical polyurethane foam impregnated into aqueous polyurethane coatings, initial impact wave the suction performance of polyurethane foam materials with the different content of conductive carbon black and the ratio of aqueous polyurethane. The results show that: conductive carbon black can effectively reduce the polyurethane foam conductivity and dielectric constant. The absorbing properties can be the best relatively when adding amount of carbon black for a specific value.

Keywords： polyurethane foam conductive carbon black water-borne polyurethane foam dielectric constant absorbing properties of the materials