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Effect of Temperature on Viscosity Properties of LDPE Insulating Materials for High-voltage Cable
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Hongjian LIU1, Jiacai LI1, Hao LIU1, Shihang WANG1, Shengtao LI1, Shenghe WANG2, Dong PAN2
Insulating Materials | 2022, 55(3) : 45 - 50
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Insulating Materials | 2022, 55(3): 45-50
• Material Research •
Effect of Temperature on Viscosity Properties of LDPE Insulating Materials for High-voltage Cable
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Hongjian LIU1, Jiacai LI1, Hao LIU1, Shihang WANG1, Shengtao LI1, Shenghe WANG2, Dong PAN2
Affiliations
  • 1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
  • 2State Grid Anhui Electric Power Company, Hefei 230061, China
Published: 2022-03-20 doi: 10.16790/j.cnki.1009-9239.im.2022.03.006
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The extrusion process of high-voltage cable insulating material is very important to the quality of high-voltage cable. The viscosity properties and temperature stability of cable insulation low density polyethylene (LDPE) base material determine the extrusion processing characteristics of cable insulating material. In this paper, three kinds of LDPE base material were extracted from three different brands of cable insulating materials. The molecular chain structure of LDPE base material was tested by gel permeation chromatography (GPC), and the rheological properties of LDPE base material were obtained by rotational rheometer at different temperatures (120-150℃). The results show that the shear thinning behavior of LDPE base material with different molecular chain structures is more obvious with the increase of temperature. The complex viscosity and zero-shear viscosity are affected by the weight-average molecular weight and its distribution. The viscous flow activation energy decreases with the increase of shear rate, which is about 20-30 kJ/mol in low frequency region and 9-16 kJ/mol in the high frequency region, it is closely related to the synergistic effect of branching degree, weight-average molecular weight and its distribution.

high-voltage cable  /  insulating materials  /  low density polyethylene (LDPE)  /  temperature  /  viscosity properties
Hongjian LIU, Jiacai LI, Hao LIU, Shihang WANG, Shengtao LI, Shenghe WANG, Dong PAN. Effect of Temperature on Viscosity Properties of LDPE Insulating Materials for High-voltage Cable[J]. Insulating Materials, 2022 , 55 (3) : 45 -50 . DOI: 10.16790/j.cnki.1009-9239.im.2022.03.006
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.03.006
  • Receive Date：2021-05-13
  • Online Date：2025-12-22
  • Published：2022-03-20
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History
  • Received：2021-05-13
  • Revised：2021-07-17
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Affiliations
    1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
    2State Grid Anhui Electric Power Company, Hefei 230061, China
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表12种不同金属材料的力学参数
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
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Percentage of total
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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
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