Effects of byproducts of dicumyl peroxide on space charge formation in polyethylene

Hirai, Naoshi; Minami, Ryotaro; Ohki, Yoshimichi; Okashita, M.; Maéno, Takashi

doi:10.1109/icsd.2001.955690

Cited by 12 publications

(6 citation statements)

References 2 publications

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“…However, as the voltage is increased to 10 kV, heterocharges can no longer be seen due to charge injection from the electrodes. These results have been previously reported in [12] but not discussed.…”

Section: Cumyl Alcoholsupporting

confidence: 79%

Analysis of space charge formation in LDPE in the presence of crosslinking byproducts

Hussin

Chen

2012

IEEE Trans. Dielect. Electr. Insul.

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Cross-linking byproducts are suspected to be the main contributing factor in space charge formation observed in XLPE. To investigate the mechanism behind this phenomenon, low density polyethylene was soaked into three main crosslinking byproducts, acetophenone, -methylstyrene and cumyl alcohol, and space charge measurements were performed using the Pulse Electroacoustic technique (PEA). It has been found that soaking LDPE in cumyl alcohol introduces more charges into the system, with homocharges and heterocharges accumulating within the sample compared to the additive free sample. In contrast, -methylstyrene and acetophenone reduce the amount of accumulated charges. In terms of charge decay, all three byproducts enhance the decay process in the insulator. Further investigations were conducted in conditions where two byproducts are present in a sample. The results shows that acetophenone is a dominant byproduct in determining the charge density patter built up during the charging process, whilst the rate of charge decay is observed to be high in the presence of -methylstyrene in the sample.

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Section: Cumyl Alcoholsupporting

confidence: 79%

Analysis of space charge formation in LDPE in the presence of crosslinking byproducts

Hussin

Chen

2012

IEEE Trans. Dielect. Electr. Insul.

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“…First, if we compare Figs. 2 and 3, we will soon notice that the space charge accumulates more in the degassed samples than in the as-received samples at both 25 and 50 o C. In our previous studies [8,11], it was confirmed that the space charge formation is suppressed in LDPE and in XLPE if acetophenone or -methylstyrene is present in the samples.…”

Section: Discussionmentioning

confidence: 74%

“…In particular, several papers have reported that a NC of low- Tributyl phosphate (a1) as-X (b1) as-nX (c1) as-nfX 11 density polyethylene (LDPE) or crosslinked polyethylene (XLPE) and inorganic magnesia (MgO) nanofillers shows superior characteristics. Namely, neither accumulation nor growth of space charge is seen in the NC of LDPE/MgO or that of XLPE/MgO with proper filler contents [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Space charge behavior of XLPE/silica nanocomposites under high electric field

Arai

Kanegae

Tanaka

et al. 2011

Proceedings of 2011 International Symposium on Electrical Insulating Materials

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Space charge formation behavior is compared among crosslinked polyethylene and its two nanocomposites with silica nanofillers with and without surface treatment. By conducting a degassing treatment, we have prepared nine kinds of samples in total. As a result, it was found that the presence of cross-linking by-products suppresses space charge formation. As far as the present silica nanofillers are concerned, their addition to XLPE enhances the formation of negative space charge near the cathode.

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“…Nevertheless, there is no strong evidence to support this argument. In [11], the authors proposed an alternative mechanism of charge acceleration in acetophenone and α -methylstyrene due to presence of the benzene ring and double bond in both chemicals' structure. However, further investigation is required before a firm understanding can be reached.…”

Section: Space Charge Decaymentioning

confidence: 99%

The Effect of Acetophenone and alpha-Methylstyrene on the Space Charge Properties of Low Density Polyethylene

Hussin

Chen

2008

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Abstract-In this report the pulsed elcetroacoustic (PEA) technique was employed to examine the space charge pattern in acetophenone and alpha-methylstyrene soaked low-density polyethylene (LDPE) samples. The samples were stressed at three different voltages; 5kV, 8kV and 10kV, and the charge patterns in the sample bulk were compared with that obtained from the clean LDPE. These chemicals are observed to assist the transportation of the charges in the sample bulk. Each of these chemicals is in favour of different charge polarity. It seems that acetophenone assists the transportation of negative charges meanwhile the transportation of positive charges is assisted by the alphamethylstyrene. It is proposed that the chemicals provide shallow traps that aid the movement of the charges.

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Effects of byproducts of dicumyl peroxide on space charge formation in polyethylene

Cited by 12 publications

References 2 publications

Analysis of space charge formation in LDPE in the presence of crosslinking byproducts

Analysis of space charge formation in LDPE in the presence of crosslinking byproducts

Space charge behavior of XLPE/silica nanocomposites under high electric field

The Effect of Acetophenone and alpha-Methylstyrene on the Space Charge Properties of Low Density Polyethylene

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