Title :
Space charge dynamics in polypropylene
Author :
Mizutani, T. ; Nakane, I.E. ; Kaneko, K. ; Ishioka, M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Japan
Abstract :
We investigated the space charge dynamics in polypropylene, M-PP and Z-PP which were polymerized using metallocene and Ziegler catalysts, respectively. Space charge distributions depended upon temperature, polarity and electrode materials. Carriers injected from the semiconducting electrode played an important role in the formation of space charge in PP at high temperatures. The amount of space charge was the largest around 40°C for both M-PP and Z-PP. They showed similar space charge dynamics in spite of their difference in morphology. Z-PP showed larger current than M-PP. These results were also compared with those of polyethylene and they were discussed considering the difference in morphology among M-PP, Z-PP and polyethylene.
Keywords :
charge injection; organic insulating materials; polymers; space charge; 40 degC; M-PP; Z-PP; Ziegler catalysts; electrode materials; high temperature space charge formation; injected carriers; insulating material breakdown; metallocene; morphology; polyethylene; polypropylene space charge dynamics; power cable insulating material; semiconducting electrode; space charge distribution; space charge measurement; Cable insulation; Charge measurement; Current measurement; Electrodes; Morphology; Polyethylene; Polymer films; Semiconductivity; Space charge; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on
Print_ISBN :
0-7803-8584-5
DOI :
10.1109/CEIDP.2004.1364182
