复合绝缘子伞裙硬化机理研究  

Study on the Hardening Mechanism of Composite Insulators

作　　者：张振泉[1] 付豪[1] 李耀中[1] 庄文兵[1] 郑子梁 贾志东[2] 陈灿[2] 

机构地区：[1]国网新疆电力公司,乌鲁木齐830000 [2]清华大学深圳研究生院,深圳518055

出　　处：《环境技术》2015年第2期54-58,共5页Environmental Technology

摘　　要：作为复合绝缘子伞裙护套的主要材料,高温硫化硅橡胶的性能在很大程度上决定了整支复合绝缘子的运行性能。高温硫化硅橡胶的硬化现象会严重影响复合绝缘子伞裙的力学性能;同时硬化现象往往伴随着更严重的性能劣化,例如憎水性的下降甚至丧失等,这些现象会直接威胁电力系统安全运行。针对复合绝缘子的硬化现象研究了硬化的内在机理,并采用平衡溶胀法研究了复合绝缘子交联密度与硬度的关系。研究认为,复合绝缘子的硬化主要是由于填料与硅氧烷进一步吸附导致的,同时也有硅氧烷氧化的作用。As the main material of shed and sheath of composite insulators, the property high temperature vulcanized silicone rubber has great impact on its performance. The hardening of silicone rubber could lead to the degradation of mechanical properties as well as the loss of hydrophobicity, which is a big threat to the power system. In this paper, the mechanism of silicone rubber’s hardening phenomenon is studied and the relation between hardness and crosslinking density is analyzed. It is concluded that the hardening of silicone rubber is caused by thermal-oxidation reaction of silicone rubber and the interaction between filler and PDMS.

关 键 词：复合绝缘子 硬化 交联密度 热氧老化 交联反应 

分 类 号：TM216[一般工业技术—材料科学与工程]