Influences of the Ratio of Polyol and MDI on the Acoustic Parameters of Polyurethane

International Conference on Smart Engineering Materials 2018

Wang, Yonghua^1 ; Liu, Zheming^1 ; Wu, Haiquan^3 ; Zhang, Chengchun^2 ; Yu, Huadong^1 ; Ren, Luquan^2 ; Ichchou, Mohamed^3

Ultra Precision Machining Laboratory, Changchun University of Science and Technology, Changchun

130021, China^1

Key Laboratory of BionicEngineering of Ministry of Education, Jilin University, Changchun

130025, China^2

Laboratory of Fluid Mechanics and Acoustics, Ecole Centrale de Lyon, Ecully

69131, France^3

关键词: Absorption co-efficient;    Acoustic parameters;    Change trends;    Flow resistance;    High-frequency sounds;    Sound absorption;    Sound absorption coefficients;    Transmission loss;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/362/1/012016/pdf
DOI  :  10.1088/1757-899X/362/1/012016

来源: IOP

【 摘 要 】

In this paper, the influence of different ratio of polyol and MDI on the absorption coefficient and acoustic parameters of polyurethane was studied. Ratio of 100:40 and 100:45 show the best sound absorption performance, and the change trend of transmission loss and sound absorption coefficient are opposite. The flow resistance increased with the increasing of the ratio of polyol and MDI, the greater the flow resistance, the worse the high frequency sound absorption property of the polyurethane. When the ratio of polyol and MDI keep 100:45, the minimum porosity of sample, the polyurethane porosity increase with the ratio of polyol and MDI increase.