高电压技术2011，Vol.37Issue(10)：2477-2484,8.
化学交联方式对聚乙烯水树枝老化特性的影响
Influence of Chemical Cross-linking on Water Treeing in Polyethylene
王金锋 1刘志民 2李彦雄 1乌江 1韩鹏凯 1郑晓泉2
作者信息
- 1. 西安交通大学电力设备电气绝缘国家重点实验室,西安710049
- 2. 上海西门子高压开关有限公司,上海200245
- 折叠
摘要
Abstract
The relationship between chemical cross-linking and water treeing was studied. Low density polythene, peroxide cross-linked polyethylene and silane cross-linked polyethylene were chosen as the testing materials. During the experiments, liquid needle electrodes method was used for water tree development, and metallographic microscope was used for observation of water tree morphology and crystalline morphology of samples. Meanwhile, sizes and initiation rates of water trees were counted. Crystalline, cross-linking degree, impurity content and electrical performances of samples were measured. The experimental results reveal that, firstly, chemical cross linking can change the crystalline and crystal morphology of polythene, which makes the crystal blocks of polythene cross-linked small and compact; secondly, chemical cross-linking has a significant impact on water treeing. Before and after being cross-linked, difference of crystal block sizes is the main reason of difference of water treeing. The growth of water trees is faster in polythene samples in which crystal blocks are larger and the number of the crystal blocks is smaller. In contrast, water trees grow more slowly in other polythene samples in which crystal blocks are smaller in size and greater in number; finally, three-dimensional network structure and by-products of the cross-linked polythene have a significant impact on electrical properties of materials.关键词
水树枝/化学交联/聚乙烯（PE）/交联聚乙烯（XLPE）/结晶形态/电气性能Key words
water tree/chemical cross-linking/polyethylene （PE）/cross-linked polyethylene （XLPE）/crystalline morphology/electrical performances分类
信息技术与安全科学引用本文复制引用
王金锋,刘志民,李彦雄,乌江,韩鹏凯,郑晓泉..化学交联方式对聚乙烯水树枝老化特性的影响[J].高电压技术,2011,37(10):2477-2484,8.
