Experimental Optimization of Acoustic Properties of Polyurethane Foam

Abstract

The polyurethane foam with different structure was prepared by one-step foaming process, and the acoustic properties of the foam were measured by impedance tube, using sound absorption coefficient as the measure index, the effects of manufacturing temperature, ratio of polyols to MDI and total mass (density) on the acoustic properties of polyurethane were analyzed by experimental optimization design. The test results show that the ratio of polyols to MDI is the most important factor affecting the sound absorption coefficient, and the effect of total mass and manufacturing temperature take the second place, the quadratic order of temperature has a major impact on the average acoustic absorptivity of polyurethane.