Title :
Space charge and conduction in LDPE-polypropylene copolymer blends
Author :
Zhang, Chao ; Mizutani, Teruyoshi ; Kaneko, Kazue ; Mori, Tatsuo ; Ishioka, Mitsugu
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
In the previous paper, the electrical breakdown properties of blend polymers of LDPE and polypropylene copolymer were investigated. The impulse breakdown strength in the high temperature region (90°C) was improved by blending. In the present paper, the space charge behavior and electrical conduction of the blends were studied with the electrode system of aluminium/sample/semiconductive layer. The specimen with 90 wt.% LDPE and 10 wt.% polypropylene copolymer (B10) had a larger amount of space charge than pure LDPE (PE) at 30°C. On the other hand, the DC current of B10 was less than that of PE in this temperature region. It was found that the anode field was related to the current in both PE and B10, which suggests that the carrier injection from the anode is dominant to the electrical conduction. The DC currents of both PE and B10 showed good straight lines on the Schottky plot with the same Schottky coefficients
Keywords :
MIS structures; charge injection; dielectric thin films; electrical conductivity; polymer blends; polymer films; space charge; 30 C; 90 C; Al; DC current; DC currents; LDPE; LDPE-polypropylene copolymer blends; Schottky coefficients; Schottky plot; aluminium/sample/semiconductive layer system; anode field; blend polymer; carrier injection; conduction; electrical breakdown; electrical conduction; electrode system; high temperature region; impulse breakdown strength; space charge; Aluminum; Anodes; Charge measurement; Current measurement; Electric breakdown; Electrodes; Plastic insulation; Polymers; Space charge; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963481
