Analysis of thermal aging life and physicochemical properties of crosslinked polyethylene seabed cable insulation

作者：Wang, Hang; Tan, Guoxin; Tan, Ying; Zhou, Lei; Zhou, Fan; Liu, Gang; Lu, Ying

来源：Polymer Materials Science and Engineering, 2015, 31(3): 71-75.

• Accelerated thermal aging
• Arrhenius formula
• Cable insulation layer
• Crosslinked polyethylene
• Elongation at break
• Operation and maintenance
• Physical and chemical properties
• Physicochemical property

Crosslinked polyethylene (XLPE) seabed cable insulation layer in the process of thermal aging life will be affected, its micro physical and chemical properties can also be changed. The accelerated thermal aging experiment was simulated using the new 110 kV XLPE seabed cable insulation layer, its retention rate of elongation at break was tested, and its aging life was deduced with the Arrhenius formula. And the carbonyl index was analysed by Fourier infrared (FT-IR), and the crystallinity was analysed by differential scanning calorimetry (DSC). The results show that the new XLPE seabed cable aging life can reach 80 years, and the carbonyl index of XLPE seabed cable insulation layer will increase with extension of the thermal aging time after thermal aging, the crystallinity increases firstly and then sharply reduces with extension of the thermal aging time;with the crystallinity of XLPE increasing, the retention rate of elongation at-break decreases. The comprehensive study of macro mechanics and micro physicochemical properties can provide the theoretical basis for operation and maintenance of the cable.

• 出版日期2015-3-1
• 单位华南理工大学