Research on Sound Insulation Material Prepared from Used Insulator Silicone Rubber
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摘要: 以废旧绝缘子硅橡胶与甲基乙烯基硅橡胶混炼制备复合再生硅橡胶隔声材料。采用拉力机、双通道阻抗管吸隔声测试系统、FTIR、TG-MS等对制备的复合材料进行声学性能、热力学性能等表征分析。结果表明，当绝缘子硅橡胶的质量分数为40%、DBMPH用量为0.75%、绝缘子硅橡胶粒径为40目时，复合再生硅橡胶隔声材料的抗拉强度为1.13 MPa、断后伸长率为23%、撕裂强度为15.2 k N·m-1、邵尔A硬度为80，复合材料在厚度为1 cm时中低频（500~1000 Hz）平均隔声量达到40 d B；运用FTIR技术对Si—OH、C＝C、O—H等特征基团分析表明，再生后的复合材料老化性能有明显的改善；TG-MS分析表明复合材料具有良好的热性能，且不会产生甲醛等环境有害气体；再生后的复合硅橡胶材料隔声性能良好，不仅解决了废旧绝缘子硅橡胶出路的问题，又能将其变废为宝，利于资源回用。Abstract: Silicone rubber insulation material was prepared from used insulator silicon rubber and methyl vinyl silicone rubber (MVQ). The mechanical and acoustic performances of regenerated material were investigated. The results indicated when the mass fraction of the used insulator silicon rubber was 40%, DBMPH content 0.75% and the particle size of the used insulator rubber 40 meshes, the tensile strength of the regenerated material was 1.13 MPa, the elongation at breaking 23%, tear strength 15.2 k N·m-1 and Shore A hardness 80. And the average sound insulation at low and medium frequency could reach 40 d B when the thickhess of the composite was 1 cm. FTIR results indicated that the aging properties of silicone rubber composites was improved greatly. TG-MS results showed that this material had good thermal stability and did not produce harmful gases like formaldehyde. The composite material with good sound insulation property was friendly to the environment. Its application could not only find new life for used insulator rubber but also produce economic values.
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