How does the resistance to oxidation of polyethylene compare to PVC outdoors?

When comparing the resistance to oxidation of polyethylene and PVC in outdoor environments, several key differences emerge. Polyethylene, while highly flexible and chemically resistant, is more susceptible to UV degradation and oxidation over time when exposed to sunlight. PVC, on the other hand, contains chlorine atoms in its molecular structure, which provide inherent resistance to oxidation and UV radiation. However, PVC can become brittle with prolonged outdoor exposure due to plasticizer loss. Both materials benefit from stabilizers and additives to enhance their outdoor performance. For long-term outdoor applications, PVC generally outperforms polyethylene in oxidation resistance, but proper formulation and UV protection can improve polyethylene's durability. The choice between the two depends on specific environmental conditions and application requirements.