【摘要】 聚氨酯硬泡 (PU)在汽车中应用广泛。客车制造厂采用聚氨酯硬泡的初衷是认为这种材料具有隔热、吸声、隔声的功能。但通过实验和理论分析 ,结果表明聚氨酯硬泡具有良好的隔热性能 ,但吸声和隔声性能均很差更多还原

【Abstract】 PU is widely used in automobiles and also viewed as a material which has the function of heat insulating,sound absorbing and sound insulating.But when this material is experimented and analyzed,it is found that PU has an excellent heat insulating function,though its sound absorbing and sound insulating functions are very poor.更多还原