基于TG法和CA法的核用电缆交联料活化能对比分析  

Comparative Analysis of Activation Energy for Nuclear Cable Crosslinking Materials Based on TG Method and CA Method

作　　者：刘超 代娜 丁晓青 LIU Chao;DAI Na;DING Xiaoqing(Shanghai National Center of Testing and Inspection for Electric Cable and Wire Co.,Ltd.,Shanghai 200444,China)

机构地区：[1]上海国缆检测股份有限公司,上海200444

出　　处：《电线电缆》2024年第5期52-57,共6页Wire & Cable

摘　　要：分别参照ISO 11358-2:2021和GB/T 11026.1—2016,采用热重分析法(TG)和常规热老化法(CA)得到了8种核用电缆交联料的阿伦尼乌斯(Arrhenius)曲线方程和活化能。通过对比数据,分析了TG法以失重率为5%和10%为失效终点计算所得活化能与CA法计算结果的特点和差异。结果表明,每种试样按TG法计算,失重率为5%时的活化能均小于失重率为10%,且与CA法的计算结果相比无明显规律可循;对于核用交联聚烯烃材料,TG法失重率为5%时的活化能与CA法接近;对于乙丙橡胶材料,TG法在宜选用更小的失重率。Referring to ISO 11358-2:2021 and GB/T 11026.1—2016,Arrhenius curve equation and activation energy of eight nuclear cable crosslinking materials were obtained by thermogravimetric analysis(TG)and conventional analysis(CA),respectively.By comparing the results,characteristics and differences of activation energies obtained between TG method with weight loss of 5%and 10%(mass percentage)and CA method were analyzed.Results indicated that,activation energy obtained from TG method with weight loss of 5%was lower than that with weight loss of 10%,and there was no clear pattern compared to the results obtained from CA method.For nuclear-grade crosslinked polyolefin materials,activation energy obtained from TG method with weight loss of 5%was close to the result obtained from CA method.While,for ethylene propylene rubber(EPR)materials,a smaller weight loss should be selected.

关 键 词：热重分析法 绝缘材料 活化能 核用电缆交联料 

分 类 号：TM206[一般工业技术—材料科学与工程]