聚丙烯/中空玻璃微球复合材料隔声特性分析

Analysis on Sound Insulation Performance of PP/HGB Composites

分析了中空微球填充聚合物复合材料的隔声机理,由此建立了中空微球填充聚合物复合材料的隔声模型并推导出相应的隔声量方程,同时预测了中空玻璃微球(HGB)填充聚丙烯(PP/HGB)复合材料的隔声量,并将其与实测数据进行了比较。结果表明:PP/HGB复合材料的隔声量随着声波频率的增加而增大,其中当频率较低时,复合材料的隔声特性对频率的敏感性较强;PP/HGB复合材料的隔声量与HGB的体积分数成线性关系;随着声波频率或HGB体积分数的增加,隔声量的理论预测值与实测数据具有大致相同的变化趋势。

The sound insulation mechanisms of polymer composites filled with hollow microspheres were analyzed. On this basis, the sound insulation physics model of hollow microsphere-filled polymer composites was established and corresponding acoustics equation was deduced. At the same time, the sound insulation performance of hollow glass bead-filled polypropylene（PP/HGB） composites was estimated, and the predicted sound transmission loss are compared with the measured data. The results show that the sound transmission loss of the PP/HGB composites increases with the increase of acoustic wave frequency, and the sound transmission loss is sensitive to sound frequency at low acoustic wave frequency. The sound insulation loss of the composites has a linear relationship with the HGB volume fraction, moreover, both the predicted sound insulation loss and the measured data have a similar variation with the increasing acoustic wave frequency or the filler volume fraction.