The Weathering of the PVC Insulation of Overhead Lines 2. Comparison of Natural and Artificial Weathering

摘要

The factors which influence the weathering in the UK of green poly(vinyl chloride) - PVC - used as insulation for overhead power lines have been investigated. Degradation processes such as surface cracking, bulk cracking and color change are explaind with reference to PVC composition. It is shown that artificial, accelerated weathering in a Xenotest-150 machine correlates well with long-term natural weathering, and can be successfully used for the rapid assessment of new compounds.