Breakdown strength analysis of XLPE insulation types: A comparative study for multi-layer structure and voltage rise rate

Camalov, Mehti; Orucov, Allahverdi; Hashimov, Arif; Arikan, Oktay; Akin, Firat

doi:10.1016/j.epsr.2023.109703

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…When PE chains are linked through crosslinking, it enhances the physical properties of the material, such as its strength, durability, and thermal stability. This makes crosslinked polymers highly desirable for a wide range of applications, including in the automotive, aerospace, and construction industries [9][10][11][12][13]. Crosslinked polyethylene (XLPE) has become increasingly popular among scientists and engineers for its outstanding performance properties.…”

Section: Introductionmentioning

confidence: 99%

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Chen,

Huang

2023

Gels

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The crosslinking behavior of polyethylene (PE) determines its exceptional performance and application. In this study, we investigated the crosslinking behaviors of different PE resins through model simulation and rheological methods. Specifically, the mathematical equation of “S” model was established for PE resin. According to this equation, the optimal maximum gel content for high-density polyethylene (HDPE) was found to be around 85%. Moreover, the maximum crosslinking degrees for different PE resins depended largely on their density and molecular weight. The melt viscosities before crosslinking in PE resins were highly influenced by their melt index. The higher melt indexes resulted in the lower storage moduli, improving melt processability during processing. In addition, the crosslinking rates of PE resins were strongly influenced by peroxide concentration, independent of PE resin structures. For high molecular weight and low-density PE resins, they exhibited decreased ti values, increased A0 values, and decreased k6 values. However, there were no noticeable variations in the values of k2 and phi among different PE resins. All simulated modeling outcomes showed remarkable consistency with the experimental rheological data. These findings are of strong significance in the industrial manufacture of PE resin.

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Section: Introductionmentioning

confidence: 99%

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Chen,

Huang

2023

Gels

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“…When PE chains are linked through crosslinking, it enhances the physical properties of the material, such as its strength, durability, and thermal stability. This makes crosslinked polymers highly desirable for a wide range of applications, including in the automotive, aerospace, and construction industries [9][10][11][12][13]. Crosslinked polyethylene (XLPE) has garnered growing attention from scientists and engineers due to its exceptional performance properties, including excellent cable function, high wear resistance, outstanding chemical resistance, notched impact strength, low shrinkage, and superior thermal resistance [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Chen,

Huang

2023

Preprint

View full text Add to dashboard Cite

The crosslinking behavior of polyethylene (PE) determines its exceptional performance and application. In this study, we investigated the crosslinking behaviors of different PE resins through model simulation and rheological methods. Specifically, the mathematical equation of "S" model was established for PE resin. According to this equation, the optimal maximum gel content for high-density polyethylene (HDPE) was found to be around 85%. Moreover, the maximum crosslinking degrees for different PE resins depended largely on their density and molecular weight. The melt viscosities before crosslinking in PE resins were highly influenced by their melt index. The higher melt indexes resulted in the lower storage moduli, improving melt processability during processing. In addition, the crosslinking rates of PE resins were strongly influenced by peroxide concentration, independent of PE resin structures. For high molecular weight and low-density PE resins, they exhibited decreased ti values, increased A0 values, and decreased k6 values. However, there were no noticeable variations in the values of k2 and phi among different PE resins. And all simulated modeling outcomes showed the remarkable consistency with the experimental rheological data. These findings are of utmost significance in the industrial manufacture of PE resin.

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Study on water tree resistance and self‐healing properties of multi‐monomer melt‐grafted polyethylene

Zhu,

He,

Sun

et al. 2024

J of Applied Polymer Sci

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In order to suppress the damage of cable insulation caused by water tree structure formed by micro‐droplets at insulation defects in low density polyethylene (LDPE) materials under AC electric field. In this paper, the siloxane group is grafted onto LDPE by melt grafting method, and different content of comonomer styrene (St) is added to improve the grafting rate of siloxane group grafted polyethylene. The effect of St on the microscopic characteristics of LDPE grafted KH570 is studied. In order to verify the accuracy and timeliness of water tree self‐healing of grafted polymer insulation materials, the microstructure characteristics of LDPE ungrafted and grafted polymer samples are analyzed by Fourier transform infrared spectroscopy, gel content test, and differential scanning calorimeter. Second, the AC dielectric properties of LDPE ungrafted and grafted polymer samples are studied by AC breakdown experiment and space charge test. Finally, the water tree length, micropore defects, and self‐healing of the samples are observed by optical microscopy and polarization and depolarization current method, and the changes of chemical composition in the water tree area before and after aging are analyzed by infrared spectroscopy. The principle and mechanism of repairing water tree defects with grafted monomers are explained. This paper not only combines the previous research results of self‐healing materials, but also provides a new method for the preparation process of LDPE grafted polymer, which has a good research prospect in practical application.

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Breakdown strength analysis of XLPE insulation types: A comparative study for multi-layer structure and voltage rise rate

Cited by 7 publications

References 27 publications

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Model Simulation and Rheological Research on Crosslinking Behavior of Polyethylene Resin

Study on water tree resistance and self‐healing properties of multi‐monomer melt‐grafted polyethylene

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