Title :
On the effect of temperature on the propagation of water trees in polyethylene
Author :
Bouzerara, R. ; Filippini, J.C. ; Poggi, Y.
Author_Institution :
CNRS, Grenoble, France
Abstract :
The effect of temperature on the growth of water trees in polyethylene was studied using injection-moulded laboratory specimens with water needle electrode. An increase in temperature form 25°C to 65°C was found to significantly decrease the growth rate of water trees. At 65°C the trees are more opaque. This reveals a higher intensity of the degradation inside the tree, which might play a role in the breakdown process. The annealing of the material during the test at 65°C is responsible for a large part of the observed temperature effect, pointing out the essential importance of the control of the material morphology when performing laboratory tests
Keywords :
electric breakdown of solids; organic insulating materials; polymers; 25 to 65 C; annealing; breakdown process; effect of temperature; growth of water trees; growth rate; injection-moulded laboratory specimens; laboratory tests; material morphology; polyethylene; propagation of water trees; temperature effect; water needle electrode; water trees; Annealing; Degradation; Electric breakdown; Electrodes; Laboratories; Materials testing; Needles; Polyethylene; Temperature; Trees - insulation;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38435
