Abstract
The effect of electron beam irradiation at different radiation doses (50, 100, 150, 200, and 300 kGy) on Low-density polyethylene/ethylene-vinyl acetate copolymer (LDPE/EVA) blend was investigated. Measurements of I–V characteristics have been carried out at room temperature. It was found that the β parameter increases with the doses. This feature was attributed to the differences in electrical conductivity of the materials. The conduction mechanism is discussed qualitatively on the basis of Poole–Frenkel conduction mechanisms (enhanced conductivity at high electric fields due to the lowering of the potential barrier), also, at low-voltage region conduction was discussed in terms of the Schottky conduction mechanism namely β s (Schottky field-lowering coefficient). The value of the Poole–Frenkel high field-lowering coefficient β PF increases with increasing voltage range. Both mechanisms are related and display a highly consistent response to electron beam exposure.
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