摘要
以α,ω-二羟基聚二甲基硅氧烷为基胶、气相法白炭黑为填料、氢氧化铝为阻燃剂,制得无机阻燃脱醇型单组分室温硫化(RTV-1)硅橡胶。通过测试硅橡胶的阻燃性能、力学强度、锥形量热、热失重分析、交联密度和扫描电镜观察其拉伸断面形貌探讨了氢氧化铝对阻燃脱醇型硅橡胶的阻燃和力学性能的影响。结果表明,氢氧化铝不仅是脱醇型硅橡胶的良好阻燃剂,而且是其良好的补强剂;添加60份氢氧化铝时,脱醇型RTV-1硅橡胶的燃烧氧指数达到36%,拉伸强度为1.34 MPa,断裂伸长率为392%,邵尔A硬度为48度。
Inorganic flame retarded RTV-1 silicone rubber was prepared with αω-dihydroxy polydimethyl siloxane as basic gel,fumed silica as filler and Al(OH)3 as flame retardant.Effects of Al(OH)3 on flame retardanceand mechanical properties of silicone rubber were studied by CONE,TG and crosslink density analysis,respectively.In addition, the rupture surface was examined by SEM.The results showed that Al(OH)3 was not only a good flame retardant of silicone rubber but also a good reinforcing agent.When 60 parts Al(OH)3 is added into RTV-1 silicone rubber,the oxygen index of the rubber is 36 %,the tensile strength is 1.34 MPa,the rupture elongation ratio is 392%,and the shore A hardness is 48.
出处
《有机硅材料》
CAS
2007年第6期313-317,共5页
Silicone Material
