六氟化硫—环氧树脂的热分解研究  

Research on Thermal Decomposition of SF6⁃epoxy Resin

作　　者：杨韧 林德智 杨泓钰 薛军 张晓 张伟强[2] YANG Ren;LIN Dezhi;YANG Hongyu;XUE Jun;ZHANG Xiao;ZHANG Weiqiang(State Grid Shaanxi Electric Power Research Institute,Xi’an 710054,China;Xi’an Key Laboratory of Organometallic Material Chemistry,School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119,China;State Grid Shaanxi Electric Power Company,Xi’an 710054,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,西安710054 [2]陕西师范大学化学化工学院西安市金属有机材料化学重点实验室,西安710119 [3]国网陕西省电力公司,西安710054

出　　处：《高压电器》2024年第4期139-145,共7页High Voltage Apparatus

基　　金：国网陕西省电力公司科技项目资助项目(5226ky19004D)。

摘　　要：深度挖掘SF_(6)分解产物携带电热腐蚀信息有助于提升GIS设备潜伏故障诊断精确度。研究六氟化硫—环氧树脂体系(SF_(6)-epoxy)热分解反应,阐明碳基特征分解产物与绝缘材料降解对应关系,可有效解决特征组分单一性与来源多样性之间矛盾。文中采用同步热重/差示扫描量技术系统测量了SF_(6)-epoxy热分解过程,表征了3个特征热解阶段的温度范围与放热量。在线气相色谱指认了9种碳基、硫氧分解产物。根据SF_(6)-epoxy体系热解的全景反应历程,CO_(2)可作为判定环氧树脂高温(>500℃)热腐蚀劣化的特征分解组分;CH_(4)可直接对应300~500℃发生的环氧绝缘材料的热降解劣化;SOF_(2)、H_(2)S和H_(2)可综合判定SF_(6)-epoxy体系的微水含量。Deeply mining the electrothermal corrosion information of the decomposition products of SF_(6) improves the accuracy of latent fault diagnosis of GIS equipment.Studying thermal decomposition reaction of the SF_(6)-epoxy system and clarifying the corresponding relationship between carbon-based characteristic decomposition products and degradation of insulating materials can solve the contradiction between the singularity of the characteristic com-ponents and the diversity of their source.In this paper,the thermal decomposition process of SF_(6)-epoxy is systemati-cally measured by synchronous thermogravimetry(TG)/differential scanning calorimetry(DSC),which characteriz-es the temperature range and heat release of three distinct pyrolysis stages.Nine decomposition products of carbon,sulfur and oxygen are identified by the online gas chromatography.According to the panoramic pyrolysis reaction mechanism of the SF_(6)-epoxy system,CO_(2) is proposed as the characteristic decomposition component to judge the thermal corrosion deterioration of epoxy resin at high temperature(>500℃).CH_(4) directly responds to the thermal degradation of epoxy insulating materials at 300-500℃.SOF2,H_(2)S and H_(2) comprehensively determine the ultra-low water concentration of SF_(6)-epoxy system.

关 键 词：环氧树脂 热分解 SF_(6)分解产物 热分析 

分 类 号：TM21[一般工业技术—材料科学与工程]