不同交联工艺交联聚乙烯电缆绝缘微观结构的差异研究  

Study on Difference in Micro-structure of XLPE Cable Insulation Materials with Different Cross-linking Processes

作　　者：欧阳本红[1] 李欢 李建英[1] OUYANG Benhong;LI Huan;LI Jianying(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723001,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]陕西理工大学电气工程学院,陕西汉中723001 [3]陕西省工业自动化重点实验室,陕西汉中723001

出　　处：《绝缘材料》2019年第10期13-17,共5页Insulating Materials

基　　金：陕西省教育厅重点实验室项目(18JS019)

摘　　要：对采用悬链工艺(HCCV)和立塔工艺(VCV)生产的110 kV交联聚乙烯电缆绝缘的微观结构进行表征。结果表明:相比VCV工艺XLPE电缆绝缘,HCCV工艺XLPE电缆绝缘的交联度更高、结晶度更低、球晶的平均尺寸更大、球晶尺寸的分布更加集中。在交联过程中,HCCV工艺XLPE电缆经历了更长的交联时间和更高的交联温度,因此具有更高的交联度。交联键对XLPE绝缘的结晶过程有抑制作用,因此HCCV工艺XLPE电缆绝缘的结晶度更低。在交联完毕后的冷却过程中,HCCV工艺XLPE电缆经历了更缓慢的降温过程,因此形成的球晶较完善、尺寸更大、球晶尺寸也更为集中。The micro-structure of XLPE 110 kV cable insulation prepared by high-voltage catenary continuous vulcanization(HCCV) and vertical continuous vulcanization(VCV) was characterized. The results show that compared with XLPE cable insulation prepared by VCV, XLPE cable insulation prepared by HCCV has higher cross-linking degree, lower crystallinity, larger average size of spherulites, and more concentrated distribution of spherulite size. The XLPE cable undergoes longer cross-linking time and higher cross-linking temperatures during the HCCV process, so it has higher cross-linking degree. However, the cross-linking bonds have inhibitory effects on the crystallization process, so the crystallinity of XLPE cable insulation prepared by HCCV is lower. After the cross-linking process, the HCCV XLPE cable undergoes slower cooling process, so the size of spherulite is larger and the distribution of spherulite size is more concentrated.

关 键 词：XLPE 交联工艺 交联度 结晶度 球晶 

分 类 号：TM215[一般工业技术—材料科学与工程] TM247[电气工程—电工理论与新技术]