Lamellae-controlled electrical properties of polyethylene - morphology, oxidation and effects of antioxidant on the DC conductivity.

ABSTRACT: Destruction of the spherulite structure in low-density polyethylene (LDPE) is shown to result in a more insulating material at low temperatures, while the reverse effect is observed at high temperatures. On average, the change in morphology reduced the conductivity by a factor of 4, but this morphology-related decrease in conductivity was relatively small compared with the conductivity drop of more than 2 decades that was observed after slight oxidation of the LDPE (at 25 °C and 30 kV mm^-1). The conductivity of LDPE was measured at different temperatures (25-60 °C) and at different electrical field strengths (3.3-30 kV mm^-1) for multiple samples with a total crystalline content of 51 wt%. The transformation from a 5 μm coherent structure of spherulites in the LDPE to

SUBMITTER: Karlsson ME 

PROVIDER: S-EPMC9049201 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature