What are the differences in thermal degradation rates between polyethylene and polypropylene outdoor ottomans?

When selecting outdoor ottomans, understanding the thermal degradation rates of polyethylene (PE) and polypropylene (PP) is crucial for long-term durability. Polyethylene, while highly resistant to moisture and chemicals, tends to degrade faster under prolonged UV exposure and high temperatures compared to polypropylene. Polypropylene, on the other hand, exhibits superior thermal stability, making it less prone to cracking or weakening in outdoor environments.

Key differences include:

1. Heat Resistance: PP withstands higher temperatures (up to 120°C) before degrading, whereas PE softens at lower temperatures (around 80°C).

2. UV Stability: PP generally resists UV radiation better, though both benefit from stabilizers.

3. Oxidation Rate: PE oxidizes faster under heat, leading to brittleness over time.

For outdoor ottomans in sunny climates, polypropylene is often the better choice due to its slower thermal degradation rate. However, polyethylene remains cost-effective for milder conditions. Proper maintenance and UV-resistant coatings can extend the lifespan of both materials.