BIBP反应副产物对CM/EPDM电缆绝缘层硫化胶绝缘性能的影响  

Effect of BIBP Reaction Byproducts on Insulation Properties of Vulcanizate for CM/EPDM Cable Insulation Layer

作　　者：楚定一 丁剑平[1] 熊康 方跃胜[1] 刘运春[1] CHU Dingyi;DING Jianping;XIONG Kang;FANG Yuesheng;LIU Yunchun(South China University of Technology,Guangzhou 510641,China;Guangzhou Beiyu Technology Application Co.,Ltd,Guangzhou 510660,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510641 [2]广州贝煜科技应用有限公司,广东广州510660

出　　处：《橡胶工业》2023年第11期868-875,共8页China Rubber Industry

基　　金：广东省重点领域研发计划项目(2019B010940001)。

摘　　要：研究过氧化物硫化剂BIBP反应副产物对氯化聚乙烯橡胶(CM)/三元乙丙橡胶(EPDM)电缆绝缘层硫化胶绝缘性能的影响,并引入新型助剂活化剂A替代部分BIBP,在不影响CM/EPDM胶料其他性能的同时提高硫化胶的体积电阻率。结果表明:基于本试验配方,当减少0.7份BIBP并加入0.45份活化剂A时,CM/EPDM胶料的硫化特性、硫化胶的物理性能没有下降;100℃×168 h老化后CM/EPDM硫化胶的拉断伸长率减小率增大,但符合国家和行业标准要求;CM/EPDM硫化胶浸水前的体积电阻率由1.3×10^(13)Ω·cm提高至5.0×10^(14)Ω·cm,浸水28 d后的体积电阻率由3.6×10^(10)Ω·cm提高至5.4×10^(12)Ω·cm,其绝缘性能大幅提高。进一步研究发现,BIBP在硫化过程中产生的副产物的量的变化是导致CM/EPDM胶料性能变化的主要原因,扫描电子显微镜观测到的浸水后硫化胶断面微观形貌也验证了这一结论。The effect of peroxide vulcanizing agent BIBP reaction byproducts on insulation properties of the vulcanizate for the chlorinated polyethylene rubber(CM)/ethylene propylene diene rubber(EPDM)cable insulation layer was studied,and a new auxiliary activator A was introduced to replace part of BIBP to improve the volume resistivity of the vulcanizate without affecting other properties of the compound.The results showed that base on this test formula,when 0.7 phr BIBP was reduced and 0.45 phr activator A was added,the vulcanizing characteristics of CM/EPDM compound and physical properties of the vulcanizate were not reduced,the reduction rate of elongation at break of CM/EPDM vulcanizate after 100℃×168 h aging increased,but which still met national and industry standards.The volume resistivity of CM/EPDM vulcanizate before immersion in water increased from 1.3×10^(13)Ω·cm to 5.0×10^(14)Ω·cm,and the volume resistivity after 28 d of immersion increased from 3.6×10^(10)Ω·cm to 5.4×10^(12)Ω·cm,the insulation property was improved significantly.According to further research,it was found that the change in the amount of BIBP reaction byproducts during the vulcanization process was the main reason for the changes in the properties of CM/EPDM compound,and the microscopic morphology of the vulcanizate section after immersion observed by scanning electron microscopy also confirmed this conclusion.

关 键 词：氯化聚乙烯橡胶 三元乙丙橡胶 过氧化物硫化剂 电缆绝缘层 体积电阻率 

分 类 号：TQ336.42[化学工程—橡胶工业]