PDF
Full
Outline
The cross-linking rheological properties of the cross-linked polyethylene (XLPE) insulation material can reflect the premature cross-linking phenomenon and processing performance during the extrusion process. The hindered phenol antioxidant in the insulation material can not only inhibit the thermal oxidation and degradation during extrusion process, but also effectively capture free radicals to inhibit the cross-linking reaction, thereby improving the processing performance of the polyethylene melt. In this paper, insulation materials with different types and contents of hindered phenol antioxidants were prepared, the changes in the torque and temperature of the insulation material under shear at 140℃ were tested, the cross-linking rheological properties of insulating materials were studied, and the cross-linking degree and cross-linking by-products content of the insulating materials were characterized. The results show that the worse the ability of the insulating material to inhibit premature crosslinking, the more gel is produced, and the greater the equilibrium torque. The hindered phenol antioxidant can inhibit the premature cross-linking reaction, compared with the molecular weight and steric hindrance of hindered phenol antioxidant, the number of hydroxyl groups per unit mass is more closely related to the ability to inhibit premature crosslinking.
PDF
87
39
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
