摘要
采用空心玻球、蛭石粉、粉末橡胶、有机蒙脱土和铅粉作为功能粒子，与聚氨酯杂化复合发泡，制得了聚氨酯杂化复合泡沫体声学材料。研究结果表明，加入20份上述不同功能粒子所制得的复合泡沫，它们之间的吸隔声性能差别不大，当厚度为25mm时，在125～4000Hz范围内的平均吸声系数在0．12～0．19之间，平均隔声量在12．0～13．9dB之间，但它们的泡孔结构有较大的差别，其中，铅粉／Pu复合体系的泡孔尺寸最粗，而有机蒙脱土／PU纳米复合体系的泡孔结构分布较均匀。所制得的几种复合泡沫都具有较高的拉伸强度，达到0．126MPa以上，粉末橡尼乏／Pu复合体系的泡沫拉伸强度达到0．406MPa。
The acoustic materials based on polyurethane hybrid composite foam was prepared via composition of polyurethane with hollow glass bead, powdered vermiculite, powdered rubber, organic montmorillonite, powdered lead for use as functional particle. Scanning electron microscope （SEM）revealed that every functional grain has different influence on its cellular structure, the aperture of powdered lead/PU composite foam was biggest than others, the cellular structure of organic montmorillonite/PU composite foam was uniformity. Property measurement showed that the acoustic properties of the hybrid composite foams make not much difference, when weight fraction of functional particle was 20, the average acoustic coefficient was 0. 12 -0. 19, the average noise insulation factor was 12.0 - 13.9, over the range of 125 -4000 Hz （foam thickness 25mm） ,the tensile strength of powdered rubber/PU composite foam was 0.406 MPa.
出处
《聚氨酯工业》
2006年第2期18-21,共4页
Polyurethane Industry
基金
北京市优秀人才基金资助项目20041D1300126
关键词
聚氨酯
泡沫
杂化复合
声学材料
polyurethane
foam
hybrid composite
acoustic material
