Abstract
It is established that the plastic deformation of low-density polyethylene (LDPE) under a pressure 0.5–2.0 GPa on a high-pressure apparatus of the Bridgman anvil type leads to the appearance of thermostimulated currents in samples, indicating that the samples contain trapped electrons. It is shown that two peaks are present on the temperature dependences of the currents; one of these is most probably related to the cold crystallization of the polymer, its structure being destroyed upon high-pressure deformation, while the other is related to the melting of the polymer. It is noted that the peaks were absent on temperature dependences of the currents for LDPE blends with some components; this could be due to the formation of a conducting state at interfaces. It is found that the electroconductivity of some blends after processing under pressure was higher than that in LDPE itself by a factor of 25.
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