合成橡胶工业 |
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镀银铝粉填充型电磁屏蔽硅橡胶的制备与性能 孙建生 杨丰帆 徐勤涛 于名讯 刘景 张岩 摘 要:研究了镀银铝粉填充量和环境试验对电磁屏蔽硅橡胶电学和力学性能的影响.结果发现,镀银铝粉填充量为210份(质量)是电磁屏蔽硅橡胶的逾渗阈值;最佳的镀银铝粉填充量为230份(质量),此时电磁屏蔽硅橡胶的体积电阻率为6.75×10~(-3) Ω·cm,拉伸强度为2.3 MPa,扯断伸长率为571%,邵尔A硬度为65;镀银铝粉填充型电磁屏蔽硅橡胶具有较好的耐高低温和热空气老化性能,而耐盐雾性能较差. Preparation and properties of electromagnetic shielding silicone rubber filled with silver-coated aluminium powder Sun Jiansheng(Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China) Yang Fengfan(Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China;Physics College, Shandong University, Jinan 250100, China) Xu Qintao(Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China) Yu Mingxun(Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China) Liu Jing(Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China) Zhang Yan (Institute 53 of China′s Ordnance Industry Group, Jinan 250031, China) Abstract:The effects of silver-coated aluminium powder amount and environmental test on the electrical and mechanical properties of electromagnetic shielding silicone rubber were investigated. The results showed that 210 phr of silver-coated aluminium powder was the percolation threshold of electromagnetic shielding silicone rubber, and the optimal silver-coated aluminium powder amount was 230 phr. In this case, the volume resistivity of electromagnetic shielding silicone rubber was 6.75×10~(-3)Ω·cm,tensile strength and elongation at break were 2.3 MPa and 571% respectively, while Shore A hardness was 65. The high and low temperature resistance and hot air aging resistant of the silicone rubber filled with silver-coated aluminium powder were better; however, the salt brume resistance was poor. |
收稿日期:2008年10月29日 修稿日期:2009年11月6日 出版日期:2010年1月15日 |