The influence of temperature on the electrical resistivity of the cellular polypropylene and the effect of activation energy

Abstract

In this paper, we determine the surface and volume electrical resistivity of the 50 μm thick cellular polypropylen (VHD50), for the temperature range 393–453 K. For this we use a contemporary methodology, which consist of a voltage measurement across the sample, with a known current flowing through it. This methodology includes a three-electrode system, which allows us to estimate the resistivity of the samples, based on their corresponding total resistances. The electric fields applied for a time interval of 1 min are of the order of 200 kVm−1. The order of magnitude of surface and volume electrical resistivity is 1013 Ω and 1011 Ωm, respectively. For both types of the resistivity, the temperature dependence is an increasing or decreasing exponential function, depending on the type of the activation energy, (its average value for the temperature range mentioned above is 41,20 kJmol−1), totally confirmed by the corresponding theoretical interpretation, conditioned by the ionic conduction.The methodology and equipment used, as well as the satisfying accordance with the results, found out directly or indirectly with the consulted literature, confirm the high accuracy of experimental measurements.

Decrypting the thermal effects on the electric field-induced material formation process on Cr thin films

“…This can be said because the electric field being applied is weak (<1 kV cm −1 ) and for short time intervals (=5 s). In the temperature range under consideration, ionic conduction is more favourable [25]. For an exothermic reaction, the ions already have enough energy to surmount the energy barrier and undergo the chemical reaction [25].…”

“…In the temperature range under consideration, ionic conduction is more favourable [25]. For an exothermic reaction, the ions already have enough energy to surmount the energy barrier and undergo the chemical reaction [25]. The resultant liquid product increases the net electrical resistance of the circuit.…”

Determination of Volume Conductivity of Thin Polymeric Films Using Corona Triode, When the Current through the Sample Depends Quadratically on Grid Potential

“…There are several methods used to determine the volume conductivity of polymers, as an important parameter of their electrical characteristics. In addition to the classic "static" methods (system of electrodes) [3] [4], and the "dynamic" methods, based on electron-beam irradiation effect, in thin polymeric films [5] [6], the corona triode method is used [7].…”

Determination of Volume Conductivity of Polyethylene Using Positive Corona, When the Current through the Sample Depends Linearly on Grid Potential

“…But, in addition, a "dynamic" method, based on electron-beam irradiation of thin samples of polyethylene (PE) is used for the measurement of the conductivity [2] [3] [4].…”