Charge generation and electrical degradation of cross‐linked polyethylene

Sekii, Y.

doi:10.1002/tee.22790

Cited by 11 publications

(3 citation statements)

References 25 publications

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“…2,3 Due to its low dielectric loss and low conductivity, XLPE is often used as an insulating material for high-voltage direct current (HVDC) cable. [4][5][6] Because XLPE shows a lower wear rate than conventional polyethylene, it has been used in clinical medicine as an orthopedic bearing material for many years. [7][8][9] The cross-linking of polyethylene can be achieved by a variety of methods, some of which have been widely applied in industrial production 10 : the chemical cross-linking method mainly includes the use of peroxide and silane, while the physical cross-linking method is achieved by radiation.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the low cost and easy processing of conventional polyethylene, cross‐linked polyethylene (XLPE) has excellent heat resistance, mechanical properties, and chemical resistance, thus broadening the application field of polyethylene materials 2,3 . Due to its low dielectric loss and low conductivity, XLPE is often used as an insulating material for high‐voltage direct current (HVDC) cable 4–6 . Because XLPE shows a lower wear rate than conventional polyethylene, it has been used in clinical medicine as an orthopedic bearing material for many years 7–9 …”

Section: Introductionmentioning

confidence: 99%

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Characterization of shape memory silane cross‐linked low‐density polyethylene prepared by solid‐phase grafting process

Chen

Zhou

et al. 2022

J of Applied Polymer Sci

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Silane cross-linking is a conventional process to improve the properties of polyethylene, and the most common process is completed by two-step methods including melt grafting and hydrolytic cross-linking. In this work, silane crosslinked low-density polyethylene (SXLPE) was prepared via solid-phase grafting copolymerization for the grafting of vinyl trimethoxysilane (VTMS) onto low-density polyethylene (LDPE). The grafting efficiency and cross-linking efficiency were determined by infrared analysis and gel content measurement, and the properties of the materials were evaluated by differential scanning calorimetry (DSC), X-ray diffraction (XRD) studies, thermogravimetric analysis (TGA), mechanical performance test, and shape memory behavior characterization. As the benzoyl peroxide (BPO) content changes from 0.1 to 0.5 phr, the SXLPEs exhibit an increase of cross-linking degree determined by gel content, a slight decrease of crystallinity, an improvement of thermal stability, and enhancement of elastic modulus, and more chain entanglement. The solid-phase grafting copolymerization retains substantial crystal regions of LDPE, which makes it show good shape memory properties, reaching 95% shape fixity ratio and 87% shape recovery ratio.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of shape memory silane cross‐linked low‐density polyethylene prepared by solid‐phase grafting process

Chen

Zhou

et al. 2022

J of Applied Polymer Sci

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“…Polymeric insulators have an active and important place in transmission and distribution of electricity. In this context, the significance of the aging phenomena that occur in the insulation materials used in the medium and high voltage cables and also the importance of the development of the insulation materials have emerged [1][2][3]. Crosslinked polyethylene (XLPE) has an important and influential role as a polymeric insulator material in medium and high voltage cable applications since it has good physical, chemical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electric Field and Potential Distribution of Experimental Setup for Initiating and Growing Vented Type Water Trees Using Finite Element Method

2020

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Water treeing phenomenon has an important and effective role in the service life of polymeric insulators used in the transmission and distribution of electricity. Water trees can be described as permanently localized degradations or damages that can occur in the presence of electric field and humidity. XLPE is widely used as a polymeric insulator material in medium and high voltage cable applications. An experimental setup was prepared to initiate and grow water trees artificially in a laboratory environment and the tests were performed in accordance with the actual values. The electrical and dielectric values of the test material were used for a detailed analysis with high accuracy. The magnitude of the electric field, which was defined by varying the distance between the water needles formed in the XLPE material and the aluminium plate electrode, has been analyzed for various conditions. After laboratory experiments, electric field and potential distribution were simulated and analyzed by FEM (Finite Element Method) using FEMM (Finite Element Method Magnetics) software package. Experiments revealed clearly, that even small changes in the shape of water needle can dramatically affect the electric field and hence the lifetime of the insulator. By using FEMM, both of these parameters (electric field and potential distribution) can be calculated rapidly with high accuracy. HVDC power cables play a significant role in electric power transmission, hence by using the previously described experimental setup, electric field and potential distribution were simulated and analyzed under DC voltage.

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Aging and Degradation Studies in Crosslinked Polyethylene (XLPE)

Balachandran

2021

Crosslinkable Polyethylene

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Charge generation and electrical degradation of cross‐linked polyethylene

Cited by 11 publications

References 25 publications

Characterization of shape memory silane cross‐linked low‐density polyethylene prepared by solid‐phase grafting process

Characterization of shape memory silane cross‐linked low‐density polyethylene prepared by solid‐phase grafting process

Analysis of Electric Field and Potential Distribution of Experimental Setup for Initiating and Growing Vented Type Water Trees Using Finite Element Method

Aging and Degradation Studies in Crosslinked Polyethylene (XLPE)

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