环氧树脂交联固化条件对耐电蚀痕影响的研究  

Study on the Influence of Cross⁃linking and Curing Conditions of Epoxy Resin on Tracking and Erosion

作　　者：李红梅[1] 薄博 史振朋 谭东现 LI Hongmei;BO Bo;SHI Zhenpeng;TAN Dongxian(Shanghai Ocean University,Shanghai 201306,China;State Grid Jibei Electric Power Company,Beijing 100054,China;Shanghai ROX Electric Co.,Ltd.,Shanghai 201807)

机构地区：[1]上海海洋大学,上海201306 [2]国网冀北电力公司,北京100054 [3]上海雷博司电气股份有限公司,上海201807

出　　处：《高压电器》2020年第10期29-33,共5页High Voltage Apparatus

摘　　要：环氧树脂是电力设备的重要组成部分,绝缘件生产工艺参数相对复杂,材料交联固化反应的影响因素较多。文中针对两种中压APG环氧树脂材料体系,在145℃下分别处理0~24 h,对其进行玻璃化转变温度、机械强度、击穿强度和耐电蚀痕等实验研究。结果表明,在145℃条件下,随着交联固化时间的增加,绝缘材料的机械性能提高60%~105%,击穿强度增加74%,介电常数在3.2~3.8之间,耐电痕性能达到1A2.5级标准。高温固化处理能够提高分子结构的交联度,改善环氧树脂的绝缘性能,但长时间处于高温环境会加速材料老化分解,研究证明,该环氧树脂配方最佳交联固化时间为8~16 h。Epoxy resin is an important part of power equipment.The production process parameters of insulating parts are relatively complex,and there are many factors influencing the cross-linking and curing reaction of materials.This study emphasizes two medium voltage APG resin systems,and curing 0~24 h under 145 ℃,glass transition temperature,mechanical performance,AC breakdown field strength and tracking and erosion are measured.Experimental results show that,under 145 ℃,with the increase of curing time,the mechanical performance of epoxy resins can be improved by 60%~105%,AC breakdown field strength is improved 74%.Moreover,the dielectric constant is stable between 3.2~3.8 and the tracking resistance is reached 1A2.5 standard.The degree of cross-linking can be increased under high-temperature,and the insulating properties of epoxy resins are improved.But the aging and decomposition of epoxy resins would be happened on long-term high-temperature.Studies have shown that for this epoxy resins the best treatment time is 8~16 h under high-temperature cross-linking curing.

关 键 词：环氧树脂 交联固化 玻璃化转变温度 耐电痕蚀痕 

分 类 号：TM21[一般工业技术—材料科学与工程]