Space charge accumulation and conductivity of crosslinking byproducts soaked LDPE

Hussin, Nuriziani; Chen, G.

doi:10.1109/ceidp.2010.5724002

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…This enhancement may be attributed to the deep traps introduced by copolymer P(St- co -ABA) containing a polar group, which capture charge carriers and enhance the breakdown strength under a DC electric field . However, the breakdown strength of A3 decreases to 317.1 kV/mm compared to A2 as P(St- co -ABA) increases, such that when adding more polar groups into insulation materials, there were more carriers injecting into them, which will lead to an increase in conduction and cause the destruction of materials. − …”

Section: Resultsmentioning

confidence: 99%

Electrical Properties of LLDPE/LLDPE-g-PS Blends with Carboxylic Acid Functional Groups for Cable Insulation Applications

Guo

Yang

et al. 2020

ACS Appl. Polym. Mater.

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To improve the electrical properties of linear low-density polyethylene/linear low-density polyethylene-graft-polystyrene (LLDPE/LLDPE-g-PS) blends, carboxylic acid (−COOH) functional polystyrene (PS)-poly(styrene-co-p-acryloyoxybenzoic acid) (P(St-co-ABA)) was prepared by the copolymerization method. The effects of functional PS on the electrical and other properties of LLDPE/LLDPE-g-PS blends were systematically investigated. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) results showed the addition of the copolymer had little influence on the crystal form and crystal size but increased the crystallinity degree of LLDPE/LLDPE-g-PS. Compared with LLDPE/LLDPE-g-PS blends, the dielectric constant and the dielectric loss tangent almost had no change. Due to the introduction of a polar group, the breakdown strength of blends was enhanced dramatically with an enhancement of 14.98%. Also, the space charge accumulation was suppressed obviously with a minimum mean volume charge density of 1.35 C/cm3. This supplies a serviceable means to obtain the high voltage direct current (HVDC) cable insulating materials.

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Section: Resultsmentioning

confidence: 99%

Electrical Properties of LLDPE/LLDPE-g-PS Blends with Carboxylic Acid Functional Groups for Cable Insulation Applications

Guo

Yang

et al. 2020

ACS Appl. Polym. Mater.

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“…When the content of AAP is further increased, a decreasing in DC breakdown strength is observed. In previous studies, N. Hussin and N. Hirai et al found that the presence of acetophenone can promote carrier transportation and increased the conduction at a high voltage electric field. − Therefore, when more AAP is added into materials, more carriers were injected into materials, which leads to a conduction increase and causes the destruction of materials. But even the GAAP1.4 with lowest value of 402.8 kV/mm is still 49% higher than that of neat LLDPE, which means the DC breakdown strength of LLDPE- g -AAP can be maintained at a high level in a wide range of AAP concentration.…”

Section: Resultsmentioning

confidence: 99%

Effective Strategy for Improving the Dielectric Strength and Insulation Lifetime of LLDPE

Guo

Sun

et al. 2019

Ind. Eng. Chem. Res.

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The voltage stabilizers can effectively improve DC breakdown strength of polyolefin, but its precipitation from polymer matrix inhibits its application. To address this problem, we prepared a reactive voltage stabilizer 4-acryloxy acetophenone (AAP) and employed a simple strategy of grafting it onto the LLDPE backbone to maintain polyolefin at a high DC breakdown strength level for a long time. The DC breakdown strength of thermal-treated samples at 60 °C for different periods was measured. It was found that the grafting samples performed much higher DC breakdown strength than that of neat LLDPE and blending samples after accelerated migration at 60 °C. SEM images demonstrated lower AAP precipitation on the surface of grafting samples. The purified grafting samples also exhibited high DC breakdown strength, which means the AAP can be maintained via grafting onto strategy. Meanwhile, the rheological results showed good processability of the grafting samples.

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Different Space Charge Behavior of Materials Used in AC and DC Systems

Andrade

Candela

et al. 2017

2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)

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Space charge accumulation and conductivity of crosslinking byproducts soaked LDPE

Cited by 9 publications

References 6 publications

Electrical Properties of LLDPE/LLDPE-g-PS Blends with Carboxylic Acid Functional Groups for Cable Insulation Applications

Electrical Properties of LLDPE/LLDPE-g-PS Blends with Carboxylic Acid Functional Groups for Cable Insulation Applications

Effective Strategy for Improving the Dielectric Strength and Insulation Lifetime of LLDPE

Different Space Charge Behavior of Materials Used in AC and DC Systems

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