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Hopping Conductivity And Charge Transport In Low Density Polyethylene, Jerilyn Brunson
Hopping Conductivity And Charge Transport In Low Density Polyethylene, Jerilyn Brunson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The properties and behaviors of charge transport mechanisms in highly insulating polymers are investigated by measuring conduction currents through thin film samples of low density polyethylene (LDPE). Measurements were obtained using a constant voltage method with copper electrodes inside a chamber adapted for measurements under vacuum and over a wide range of temperatures and applied fields. Field-dependent behaviors, including Poole-Frenkel conduction, space charge limited current (SCLC), and Schottky charge injection, were investigated at constant temperature. These field-dependent mechanisms were found to predict incorrect values of the dielectric constant and the field dependence of conductivity in LDPE was not found to …