微胶囊红磷对电气绝缘用硅橡胶的阻燃改性研究

研究改性氢氧化铝(m-ATH)/微胶囊红磷无卤复合阻燃剂对电气绝缘用甲基乙烯基硅橡胶物理性能、电性能和阻燃性能等的影响,并与m-ATH/十溴二苯乙烷复合阻燃剂进行对比。结果表明,m-ATH/微胶囊红磷无卤复合阻燃剂对甲基乙烯基硅橡胶具有良好的阻燃协效作用。

Flame Retardant Modification of Silicone Rubber for Electrical Insulation by Microcapsule Red Phosphorus

Methyl vinyl silicone rubber with excellent heat resistance, softness, weatherability and insulation is widely used in various fields, especially in the electrical insulation industry. Methyl vinyl silicone rubber is applied as insulated devices, such as a new kind of cable material, insulated casing, insulator umbrella skirt and so on. However, due to lack of flame resistance, methyl vinyl silicone rubber would spontaneously combust and may be converted into a flame burning in high temperature or high voltage conditions, which can cause a fire. At present, most of the halogen-based flame retardants are used to improve the flame resistance of methyl vinyl silicone rubber. In the event of the material combustion, toxic gases can be produced and harmful to human health. In this paper, the flame resistance of modified methyl vinyl silicone rubber is modified by using halogen-free composite flame retardant with modified aluminum hydroxide (m-ATH) and microcapsule red phosphorus, which is compared with the flame resistance of modified methyl vinyl silicone rubber that is modified by using composite flame retardant with m-ATH and decabromodiphenyl ethane. The effects of halogen-free composite flame retardant on the mechanical properties, electrical properties and flame resistance properties of methyl vinyl silicone rubber were studied. The results show that halogen-free composite flame retardant with m-ATH and microcapsule red phosphorus has good flame resistance synergistic effect on methyl vinyl silicone rubber.