聚氨酯泡沫夹心板的结构与频率响应特性  

The relationship between structure of polyurethane foam sandwich panels and the frequency response

作　　者：关键[1] 宋霖[1] 朱宗文[1] 李欣[1] 顾宜[2] 

机构地区：[1]四川大学高分子材料工程国家重点实验室 [2]四川大学高分子科学与工程学院,教授成都市610065

出　　处：《材料研究学报》2005年第4期426-430,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金20074023资助项目

摘　　要：制备了一系列三明治式聚氨酯(PU)泡沫夹心板,研究了聚氨酯泡沫的组成和结构与频率响应特性之间的关系.结果表明:聚氨酯泡沫夹心板的灵敏度以及频宽与材料的组成和孔径、孔隙率、开闭孔率、厚度等结构因素以及皮层材料性质有关.芯层聚合物分子组成决定材料的阻尼性能,在很大程度上决定声能的输出;芯层空气含量越高,具有阻尼性质的聚合物含量少,音板灵敏度高;声波经过材料时摩擦阻力小,灵敏度高;材料的反射界面增加,声能损耗增大.A series of classical sandwich composite panels composed of polyurethane （PU） foam core and epoxy laminate or paper panel skin were prepared. The relationships between the compositions or structures of polyurethane （PU） foam and frequency response of distributed mode loudspeaker tested by the conventional methods were studied. The experimental results show that the sensitivity and frequency area of the sandwich panels are effected by the composition, cell size, cell ratio, cell open ratio and thickness. The damping of polymer and the air content in core, the frictional resistance andthe reflection on interface acoustic wave tr^n^rnittin^r in th~ ~~nrlwirh n^n~lc ~r~ ;nf I ^-;An

关 键 词：有机高分子材料 聚氨酯泡沫 夹心板 频率响应 扬声器 

分 类 号：TB324[一般工业技术—材料科学与工程] O482[理学—固体物理]