Sound absorption behavior of multiporous hollow polymer micro-spheres

被引：37
|
作者：
Hong, Zhou [1 ]
Bo, Li [1 ]
Huang Guangsu [1 ]
机构：
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engineer, Chengdu 610065, Peoples R China
来源：
MATERIALS LETTERS | 2006年 / 60卷 / 29-30期
基金：
中国国家自然科学基金;
关键词：
polymers; micro-spheres; porosity; microstructure; acoustic absorption;
D O I：
10.1016/j.matlet.2006.03.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Multiporous polymer micro-spheres with interconnected cavities have been prepared by a simple modified emulsion polymerization of acrylate monomers and polymerizable emulsifier. The morphology of micro-spheres was characterized, by a scanning electron micrographs (SEM) and the sound absorption behavior of the micro-spheres materials was tested in an impedance tube. It is shown that the porous structures and low density allow the micro-spheres to embrace more diversified modes to attenuate sound wave energy. Besides the sound energy being dissipated at the interface of the air and the solid structures of micro-spheres, high absorption coefficient are given rise to by the vibration of the micro-spheres at the resonant frequencies. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：3451 / 3456
页数：6
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