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Electron Trapping in Polyethylene

  • Couverture cartonnée
  • 232 Nombre de pages
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The presence of space charge in the polymeric insulation of high voltage cables is correlated with electric breakdown. A direct li... Lire la suite
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Description

The presence of space charge in the polymeric insulation of high voltage cables is correlated with electric breakdown. A direct link between molecular properties, space charge formation and eventual breakdown has still to be established.A new scheme that constitutes a first step in linking microscopic defects to the formation of space charge is suggested. The goal is to understand the role of defects at the molecular level in electron trapping and the formation of space charge in polyethylene. The analysis suggests that by defining the defect energy in terms of the molecular electron affinity, a relationship is established between the electron trap and the molecular properties of the material. Conformational defects in these waxy materials are predicted to produce shallow traps with energies below 0.3 eV, their density is estimated, and the residence time of electrons is such traps is of the order of a few picoseconds.

Auteur

Dr Marc Meunier is a manager at Accelrys Ltd, the world leader inscientific informatics software. His research interests are in:space charges, simulation of polymeric materials and materialsinformatics. Editorial board member of Molecular Simulation, hispublications appear in journals of Chemical Physics, AppliedPhysics and Polymer.



Texte du rabat

The presence of space charge in the polymericinsulation of high voltage cables is correlated withelectric breakdown. A direct link between molecularproperties, space charge formation and eventualbreakdown has still to be established.A new schemethat constitutes a first step in linking microscopicdefects to the formation of space charge issuggested. The goal is to understand the role ofdefects at the molecular level in electron trappingand the formation of space charge in polyethylene.The analysis suggests that by defining the defectenergy in terms of the molecular electron affinity, arelationship is established between the electron trapand the molecular properties of the material.Conformational defects in these waxy materials arepredicted to produce shallow traps with energiesbelow 0.3 eV, their density is estimated, and theresidence time of electrons is such traps is of theorder of a few picoseconds.

Informations sur le produit

Titre: Electron Trapping in Polyethylene
Sous-titre: A molecular modelling study of space charge in thepolymeric insulation of high voltage cables
Auteur:
Code EAN: 9783639155655
ISBN: 3639155653
Format: Couverture cartonnée
nombre de pages: 232
Poids: 360g
Taille: H223mm x B154mm x T17mm
Parution: 01.05.2009
Année: 2009

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