Natural weathering of low density polyethylene: Part 2—Dielectric properties

Dielectric properties of naturally weathered low density polyethylenes have been measured as a function of temperature, frequency and weathering time. The results show that dielectric loss, dielectric constant and the β transition increase with the weathering time. However, the deterioration of the dielectric properties is strongly reduced by the presence of a uv stabilizer system.The changes in the dielectric properties can be qualitatively explained by the formation of polar groups and crosslinks.