EPDM／EVA共混隔音材料性能研究

制备了EPDM／乙烯-醋酸乙烯共聚物（EVA）共混型热塑性弹性体，并对其力学性能和隔声性能进行了研究。结果表明，随着EVA用量的增加，材料的隔声性能提高；当EPDM／EVA并用比为50／50时，材料具有良好的隔声性能；云母粉、玻璃微珠和硫酸钡3种填料中，硫酸钡用量为300份时，可显著提高隔音材料在中高频率范围的隔声性能；隔音材料层厚的增加，可使材料发生共振效应，共振频率向更高的频率移动，并使共振频率处的最低隔声量有所提高。

Study on Properties of EPDM-EVA Sound Insulation Material

The EPDM/EVA thermoplastic elastomer was prepared, and the mechanical properties and sound transmission loss were studied. The results showed that with the increasing of EVA con- tent, the sound transmission loss was increased. When the blending ratio of EPDM/EVA was 50/50, the blend had good sound insulation performance The transmission loss at mid-frequency and high- frequency could be remarkably increased when barium sulphate was 300 phr; The resonance frequency and its transmission loss at resonance frequency could be increased when the thickness of sound insula- tion material was increased.