Title :
Some considerations on the oxidation of low density polyethylene thermally aged at the temperature under and above the melting point using electric characteristics
Author :
Koo, Ja-Yoon ; Kim, Jeong-Tae ; Lee, Jeong-Heon
Author_Institution :
Dept. of Electr. Eng., Han Yang Univ., Seoul, South Korea
Abstract :
Electrical properties have been measured using TSC (thermally stimulated current) and tan δ in order to understand the oxidation of thermally stressed LDPE (low-density polyethylene) specimens which have been aged at temperatures below 100°C and above 130°C, the melting point. The authors have observed different aspects in the peaks of the TSC characteristics and of the tan δ measurements, depending on the aging temperature. The oxidation of thermally aged LDPE specimens seems to be related deeply to the aging temperature: below the melting point the amorphous regions are preferably oxidized, but above the melting point the crystalline regions as well as the amorphous regions are likely to be oxidized
Keywords :
ageing; dielectric losses; organic insulating materials; oxidation; polymers; thermally stimulated currents; -50 to 90 degC; 100 degC; 130 degC; TSC; aging temperature; amorphous regions; crystalline regions; loss tangent; low density polyethylene; melting point; oxidation; preferential oxidation; thermal aging; thermally stimulated current; thermally stressed LDPE; Aging; Amorphous materials; Crystallization; Current measurement; Electric variables measurement; Oxidation; Polyethylene; Stress measurement; Temperature dependence; Thermal stresses;
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.1991.172244
