Electrical Properties of Polyethylene Single Crystals

Abstract

The currents through polyethylene single crystals have been measured as functions of voltage and temperature between 200°K and 400°K. The negative resistance phenomena were sometimes observed when thin wire electrodes were used for measuring the current through polyethylene single crystals of 70–300 Å thickness, but their behaviors were different from those described by Roggen. In the case of vacuum evaporated electrodes, however, such phenomenon was not observed. Similar measurements have been done with polyethylene thin films formed by vacuum evaporation. In this case, the negative resistance similar to that described by Hickmott was sometimes observed. Changes of specific resistance were closely related with the change of crystal thickness in thinner crystals, and the electron transport mechanism was discussed quantitatively with simple theoretical expressions of tunneling effect and Schottky emission.

The electrical and structural properties of thin films of polymers deposited from the vapour phase, with special reference to polypropylene

“…This was supported by the fact that the sandwiches prepared only with aluminium electrodes did not show any electroforming. Miyoshi and Chino [44] also observed the negative resistance similar to Hickmott [50] in their samples of evaporated polyethylene having the same thicknesses as reported by Gazso. Hogarth and Zor [4] evaporated polyethylene a t Torr onto previously deposited aluminium electrodes.…”

An improved model to estimate trapping parameters in polymeric materials and its application on normal and aged low-density polyethylenes

“…And J h is the injection current density from the anode. With high voltage applied, charge injection behavior at the metal-polyethylene interface was verified conforming to Schottky injection mechanism 9,20,21 , which has already been applied into some previous modelling works on polyethylene 18,22,23 . Such conduction mechanism demonstrates that barrier height at the electrode-dielectric interface is lowered by the applied field and image charge force so that enhanced current density from electrodes takes place.…”

Model to estimate the trapping parameters of cross‐linked polyethylene cable peelings of different service years and their relationships with dc breakdown strengths

“…J h is injection current density from the anode. With HV applied, charge injection behaviour at the metal-insulator interface was verified conforming to Schottky injection mechanism [7,8], which has already been applied into some previous modelling works on polyethylene [9,10]. If the electric field at the interface is E i + (at the anode, or E i − at the cathode), the injection current density J h at the interface between the anode and dielectric can be found as [11]…”