2020
DOI: 10.3390/polym12010062
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Abstract: Direct current (DC) electrical performances of crosslinked polyethylene (XLPE) have been evidently improved by developing graft modification technique with ultraviolet (UV) photon-initiation. Maleic anhydride (MAH) molecules with characteristic cyclic anhydride were successfully grafted to polyethylene molecules under UV irradiation, which can be efficiently realized in industrial cable production. The complying laws of electrical current varying with electric field and the Weibull statistics of dielectric bre… Show more

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Cited by 21 publications
(12 citation statements)
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“…At present, the modification schemes for XLPE insulation materials are primarily presented by the chemical purity technique, nanocomposite technology, blending and chemical modifications [ 6 ]. Especially compared with pure polymer materials, polymer dielectric nanocomposites show various improvements in insulation performances such as the suppressed space charge accumulations, the reduced electrical conductance, and the enhanced breakdown strength, which are attributed to the numerous deep traps introduced by molecular polar groups at nanofiller/matrix interfaces [ 7 , 8 ].…”
Section: Introductionmentioning
confidence: 99%
“…At present, the modification schemes for XLPE insulation materials are primarily presented by the chemical purity technique, nanocomposite technology, blending and chemical modifications [ 6 ]. Especially compared with pure polymer materials, polymer dielectric nanocomposites show various improvements in insulation performances such as the suppressed space charge accumulations, the reduced electrical conductance, and the enhanced breakdown strength, which are attributed to the numerous deep traps introduced by molecular polar groups at nanofiller/matrix interfaces [ 7 , 8 ].…”
Section: Introductionmentioning
confidence: 99%
“…After AA-DVB C layer formation, the peak is weakened owing to the limited penetration depth of FT-IR beam [ 21 ]. The NR212/AA-DVB_2 spectra has characteristic peaks assigned to C=C stretch in the aromatic rings of DVB, and –CH stretch in the main chain of AA-DVB layer [ 15 , 22 ]. NR212/AA-DVB_2 also exhibits a strong C=O vibration peak at around 1700 cm −1 .…”
Section: Resultsmentioning
confidence: 99%
“…According to the blending components listed in Table 1, four mixtures for preparing pure and composite XLPE materials are uniformly blended and pressed into film samples at 160 • C by a plate vulcanizer, in which pressure is increased from 0 to 15 MPa at a rate of 5 MPa/5 min to melt material. For photon-initiated crosslinking reactions, the obtained melting films are irradiated by a light source array of UV LED units (NVSU233A-U365, Riya Electronics Chemistry Co. Ltd., Shanghai, China) for 180 s under normal temperature and pressure [19], in which the emitting power and light-wavelength are controlled at 1.0 w and 365 nm, respectively, with a light-incidence of a 60 • angle to the film plane [20]. After hot-degassing in short-circuit for 24 h at 80 • C in vacuum to eliminate residual chemical by-products and mechanical stresses, pure UV-XLPE and three kinds of UV-XLPE nanocomposites are finally prepared, as listed in Table 1.…”
Section: Experimental Schemes 21 Materials Preparationsmentioning
confidence: 99%
“…Meanwhile, XLPE nanocomposites filled with neat SiO 2 nanoparticles will engender considerable particle agglomerations when filling content exceeds 1.5 wt%. Furthermore, TMPTA molecules with polar-groups grafted on nanosilica surface will not be evaporated in crosslinking reactions, thus retaining a high density of effective polar-groups acting as deep traps to efficiently improve DBS under the charge trapping and scattering mechanisms [6,19]. It is thus suggested a reasonable correlation of DBS improvement with TMPTA surface-functionalization of nanosilica for XLPE-based nanodielectrics.…”
Section: Dielectric Breakdown Strengthmentioning
confidence: 99%