Kinetics of electric destruction of polymer compositions

The dependence of the electrical durability tau(E) (time from the application of constant voltage until breakdown) on the temperature T (in the range of 77-300 K) at different values of the electric field strength E of polymer compositions of polypropylene and low-density polyethylene (PP-LDPE) with different supramolecular structures (SMS) was measured. At elevated temperatures (similar to above 200 K), the dependence of lg tau(E)(T-1) is linear, indicating a thermofluctuational mechanism of breakdown preparation; at low temperatures (similar to below 200 K) tau E does not depend on T, which will allow us to conclude about its tunneling mechanism. The transition temperature of the linear dependence of tau(E) on T lies in the similar to 200 K range and depends on the value of the applied constant electric field.

Automated summary

The dependence of electrical durability Tau (E) on temperature T was measured for polymer compositions of PP-LDPE with different SMS. At elevated temperatures (above 200K), the dependence of lg Tau (E)(T-1) is linear, indicating a thermofluctuational mechanism of breakdown preparation; at low temperatures (below 200K) Tau (E) does not depend on T, suggesting a tunneling mechanism. The transition temperature of the linear dependence lies in the 200K range and varies with the applied electric field.