摘要
通过驻波管传递函数法测试了不同条件下汽车顶棚用热塑性半硬质聚氨酯泡沫的吸声性能。研究结果表明：泡沫吸声系数随密度增加而提高；泡沫厚度对中低频区吸声性能影响较大，吸声系数随厚度增加而提高；高异氰酸酯指数情况下泡沫吸声性能较好；硅藻土的引入可有效提高泡沫的吸声性能；高回弹聚氨酯泡沫与半硬质聚氨酯泡沫复合且高回弹聚氨酯泡沫为吸声面时吸声效果较好。
The sound absorption performance of thermoplastic semi-rigid polyurethane foam for automotive ceiling under different conditions was tested by using the standing wave tube transfer function method. The research results show that the sound absorption coefficient of foam increases with increase of foam density. The thickness of the foam exerts greater influence on the sound absorption performance in the middle-low frequency region, and the sound absorption coefficient increases with increase of thickness. The sound absorption performance of the foam is better under high isocyanate index. The sound absorption performance of the foam can be effectively improved by introducing the diatomite. The sound absorption effect is better by combining high resilience polyurethane foam with semi-rigid polyurethane foam and using the high resilience polyurethane foam as the sound absorption side.
作者
赵卫鸣
赵修文
张利国
李博
张涛
张莉
Zhao Weiming;Zhao Xiuwen;Zhang Liguo;Li Bo;Zhang Tao;Zhang Li(National Reaction Injection Molding Engineering and Technological Research Center,Luoyang 471000,China;Liming Research ＆ Design Institute of Chemical Industry Co.,Ltd.,Luoyang 471000,China)
出处
《化学推进剂与高分子材料》
CAS
2018年第6期48-50,共3页
Chemical Propellants & Polymeric Materials
基金
国家重点研发计划(2016YFB0301903)
关键词
汽车顶棚
半硬质聚氨酯泡沫
吸声
高回弹泡沫
复合材料
automotive ceiling
semi-rigid polyurethane foam
sound absorption
high resilience foam
composite material
