Title :
High-field electrical properties of LDPE films prepared using new catalyst
Author :
Ishimatsu, K. ; Banmongkol, C. ; Mori, T. ; Mizutani, T. ; Ishioka, M.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
New Low Density Polyethylene (m-LDPE) prepared using metallocene catalyst has a narrower composition distribution and a molecular weight distribution than Linear-Low Density Polyethylene (LLDPE) using Ziegler catalyst. We compared the electrical insulating properties of m-LDPE films and conventional LLDPE films. The high-field current of m-LDPE was found to be lower than that of LLDPE. The difference in current increased with the decrease of temperature. The high-field current was much suppressed in m-LDPE with a low melting point. The impulse breakdown strength of m-LDPE increased with the decrease of temperature. The insulating properties of m-LDPE with a low melting point were improved at 30°C. These results were explained by a fact that m-LDPE with a low melting point includes more low-molecular-weight components
Keywords :
catalysts; electric breakdown; electric strength; insulation testing; life testing; polyethylene insulation; polymer films; power cable insulation; 30 degC; LDPE films; composition distribution; electrical insulating properties; high-field current; high-field electrical properties; impulse breakdown strength; melting point; metallocene catalyst; molecular weight distribution; power cable insulation; Cable insulation; Current density; Dielectrics and electrical insulation; Electric breakdown; Mechanical factors; Polyethylene; Polymers; Power cables; Temperature; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.634582
