Electroluminescence measurements of low-density polyethylene (LDPE) films subjected to high electrical stresses in different gas environments

Ariffin, Azrul Mohd; Lewin, P.L.; Dodd, S.J.

doi:10.1109/tdei.2011.5704502

Cited by 2 publications

(1 citation statement)

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“…In general, these paths involve the reaction of the radicals produced during the initiating step with O 2 . High field experiments carried out on degassed PE, PE saturated with N 2 or SF 6 , and PE in air indicate that a lack of oxygen impedes degradation, 13 which suggests that oxygen plays an important role in the degradation process.…”

Section: Introductionmentioning

confidence: 99%

An atomistic description of the high-field degradation of dielectric polyethylene

Bealing

Ramprasad

2013

The Journal of Chemical Physics

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A microscopic mechanism governing the initiating step in the high-field aging of crystalline polyethylene is proposed, based on density functional calculations and ab initio molecular dynamics simulations. It is assumed that electrons, holes, and excitons are present in the system. While the additional individual electrons or holes are not expected to lead to significant degradation, the presence of triplet excitons are concluded to be rather damaging. The electron and hole states of the exciton localize on a distorted region of polyethylene, significantly weakening nearby C-H bonds and facilitating C-H bond scission. The barrier to cleavage of the weakened C-H bonds is estimated and is comparable to the thermal energy, suggesting that this mechanism may be responsible for the degradation of polyethylene when placed under electrical stress, e.g., in high-voltage cables.

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Section: Introductionmentioning

confidence: 99%

An atomistic description of the high-field degradation of dielectric polyethylene

Bealing

Ramprasad

2013

The Journal of Chemical Physics

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Luminescence characteristics before flashover across alumina ceramic under steady voltage in vacuum

Song

et al. 2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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Electroluminescence measurements of low-density polyethylene (LDPE) films subjected to high electrical stresses in different gas environments

Cited by 2 publications

References 43 publications

An atomistic description of the high-field degradation of dielectric polyethylene

An atomistic description of the high-field degradation of dielectric polyethylene

Luminescence characteristics before flashover across alumina ceramic under steady voltage in vacuum

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