Title :
Electrical treeing and stress cracking in polyethylene at cryogenic temperature
Author :
Weihan, Wu ; Fengnian, Hao
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
In order to test the feasibility of applying ultrahigh-molecular-weight polyethylene (UHMW-PE) as electrical insulation at cryogenic temperatures, the stress cracking resistance and the treeing resistance of UHMW-PE at 77 K were investigated in comparison with those of cross-linked polyethylene (XLPE) and low-density polyethylene (LDPE). The test results and theoretical analysis show that mechanical forces play a dominant role both in stress cracking of LDPE and XLPE and in electrical treeing at low temperature. UHMW-PE with extreme stress cracking resistance is recommended as an appropriate candidate for electrical insulation at low temperature
Keywords :
electric breakdown of solids; organic insulating materials; polymers; stress corrosion cracking; 77 K; LDPE; UHMW-PE; XLPE; cryogenic temperature; electrical insulation; mechanical forces; polyethylene; stress cracking; treeing resistance; ultrahigh-molecular-weight; Cable insulation; Cryogenics; Dielectrics and electrical insulation; Electric resistance; Insulation testing; Polyethylene; Polymers; Stress; Temperature; Trees - insulation;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172063
