EVA发泡材料吸声性能的研究  

Study on Sound Absorption Properties of EVA Foam Materials

作　　者：麻玉龙 尹晓刚[1] 付海[1] 刘卫[1] 龚维[1,2] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料工业》2016年第7期122-126,共5页China Plastics Industry

基　　金：国家自然基金项目(21264004);黔科合人字(2015)29号;黔科合人才团队[2014]4006号

摘　　要：通过模压发泡法制备乙烯-醋酸乙烯共聚物(EVA)发泡材料。运用多孔材料吸声机制分析材料孔隙率及空腔厚度对吸声性能的影响。结果表明,孔隙率及空腔厚度对发泡材料吸声性能影响显著;当孔隙率为79.6%时,材料在高频区域内有较好的吸声性能,吸声系数及降噪系数分别为0.249、0.105;随着空腔厚度增加,材料的声波第一共振频率向低频方向移动且提高了吸声性能,当空腔厚度为10mm时,发泡材料的吸声性能较好,吸声系数和降噪系数分别为0.638、0.265。EVA （ethylene-vinyl acetate copolymer） foam materials were prepared by means of molding foam. The effect of material porosity and cavity thickness on the absorption properties of the material was analyzed by using the sound absorption mechanism of porous materials. The results show that the effect of the porosity and cavity thickness on the sound absorption properties of foam materials is obvious; when the porosity is 79.6% , the materials have better sound absorption performance in high frequency region, the absorption coefficient and noise reduction coefficient are 0. 249 and 0. 105, respectively： The first resonance frequency of the foam materials moves toward to low frequency and the sound absorption performance is improved with the increase of cavity thickness. When the cavity thickness is 10 ram, the foam materials have better properties with the absorption coefficient of 0. 638 and noise reduction coefficient of 0. 265.

关 键 词：乙烯-醋酸乙烯共聚物发泡材料 孔隙率 空腔厚度 吸声性能 

分 类 号：TQ328[化学工程—合成树脂塑料工业]