Sound Absorption Properties of Polyurethane/Nano-Silica Nanocomposite Foams
Sound Absorption Properties of Polyurethane/Nano-Silica Nanocomposite Foams
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DOI：
10.1002/app.34755
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发表时间：
2012-02-15
影响因子：
3
通讯作者：
Ha, Chang-Sik
中科院分区：
文献类型：
--
作者：
Lee, Joonmo;Kim, Gue-Hyun;Ha, Chang-Sik
本研究制备了聚氨酯（PU）/纳米SiO2纳米复合泡沫材料。研究了异氰酸酯指数、泡孔尺寸、密度和多元醇分子量对聚氨酯/纳米二氧化硅泡沫吸声性能的影响。随着纳米二氧化硅含量的增加，PU/纳米二氧化硅泡沫的吸声率在本研究中研究的整个频率范围内增加。异氰酸酯指数的减小、泡孔尺寸的减小和密度的增大均导致PU/纳米SiO2泡沫材料吸声率的增大。通过降低多元醇的分子量，使PU/纳米SiO2泡沫具有以室温为中心的宽T（g），从而具有良好的吸声性能。(C)2011 Wiley Periodicals，Inc. J Appl Polym Sci 123：2384-2390，2012
In this study, polyurethane (PU)/nano-silica nancomposite foams were prepared. The effects of isocyanate index, cell size, density, and molecular weight of polyols on the sound absorption ratio of PU/nano-silica foams were investigated. With increasing nano-silica content, the sound absorption ratio of PU/nano-silica foams increases over the entire frequency range investigated in this study. Decrease of isocyanate index, cell size, and increase of density leads to the increase of sound absorption ratio of PU/nano-silica foams. PU/nano-silica foams have a broad T(g) centered around room temperature by decreasing molecular weight of polyol resulting in good sound absorbing ability. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 2384-2390, 2012