SO_(2)/盐雾环境对导电橡胶性能的影响  

Effect of SO_(2)/salt spray environment on properties of conductive rubber

作　　者：吴轩璇 任杰[1] 柏林[1] 廖亮清 WU Xuanxuan;REN Jie;BO Lin;LIAO Liangqing(Chengdu Aircraft Design&Research Institute,Chengdu 610091,China)

机构地区：[1]成都飞机设计研究所,成都610091

出　　处：《航空材料学报》2024年第3期111-117,共7页Journal of Aeronautical Materials

摘　　要：为了研究导电橡胶在SO_(2)/盐雾环境下的适应性,针对以石墨烯为导电填料的导电氟醚橡胶和以合金镍粉为导电填料的导电硅橡胶,开展“SO_(2)/盐雾”实验,通过导电橡胶的宏观形貌、邵尔A硬度、拉伸强度、拉断伸长率、撕裂强度和体积电阻率等性能测试,分析“SO_(2)/盐雾”环境对导电橡胶性能的影响。结果表明:实验前,导电氟醚橡胶和导电硅橡胶的邵尔A硬度相当,导电氟醚橡胶的拉伸强度高于导电硅橡胶,体积电阻率低于导电硅橡胶。经过8个循环的“SO_(2)/盐雾”实验,导电氟醚橡胶的宏观形貌未发生变化,邵尔A硬度下降3,拉伸强度上升0.8 MPa(5%),拉断伸长率下降18%,体积电阻率上升2.1Ω·cm(65.8%),撕裂强度无变化;导电硅橡胶发生明显的腐蚀,表面出现绿色腐蚀产物,邵尔A硬度逐渐降低,拉伸强度下降了1.2 MPa(16.4%),拉断伸长率下降2%,体积电阻率降低3.00Ω·cm(52.4%),撕裂强度无变化。综合各项性能,导电氟醚橡胶在“SO_(2)/盐雾”环境中的适应性优于导电硅橡胶。The adaptability of conductive rubber in SO_(2)/salt spray environment was studied by using graphene-filled conductive fluoroether rubber and alloy nickel powder-filled conductive silicone rubber in“SO_(2)/salt spray”test.The macro morphology,Shore A hardness,tensile strength,elongation at break,tear strength and volume resistivity were tested to analyze the influence of the“SO_(2)/salt spray”environment on the properties of conductive rubber.The results show before the test,the Shore A hardness of conductive fluoroether rubber and conductive silicone rubber are equivalent,the tensile strength of conductive fluoroether rubber is higher than that of conductive silicone rubber,and the volume resistivity is lower than that of conductive silicone rubber.After 8 cycles of“SO_(2)/salt spray”test,the macro morphology of conductive fluoroether rubber does not change,Shore A hardness decreases by 3,tensile strength increases by 0.8 MPa(5%),elongation at break decreases by 18%,the volume resistivity increases by 2.1Ω·cm(65.8%)and there is no change in tear strength;while the conductive silicone rubber has obvious corrosion,with green corrosion products appeared on the surface,Shore A hardness gradually decreases,and the tensile strength decreases by 1.2 MPa(16.4%),the elongation at break decreases by 2%,the volume resistivity decreases by 3.00Ω·cm(52.4%)and there is no change in tear strength.The analysis of the comprehensive performances obtained by the study shows that the adaptability of conductive fluoroether rubber in“SO_(2)/salt spray”environment is superior to that of conductive silicone rubber.

关 键 词：导电橡胶 环境适应性 SO_(2)-盐雾 力学性能 体积电阻率 

分 类 号：V255.3[一般工业技术—材料科学与工程] TQ330.14[航空宇航科学与技术—航空宇航制造工程]