What are the differences in thermal degradation rates between WPC and PVC-based planter materials?

When comparing WPC (Wood-Plastic Composite) and PVC (Polyvinyl Chloride) planter materials, thermal degradation rates are a critical factor for outdoor durability. WPC, a blend of wood fibers and thermoplastics, tends to degrade faster under prolonged UV exposure and high temperatures due to its organic components. PVC, being a synthetic polymer, exhibits higher resistance to thermal degradation, maintaining structural integrity longer in extreme conditions.

Studies show that WPC's degradation begins at lower temperatures (around 60-80°C), while PVC withstands higher thresholds (100-120°C) before significant breakdown. Additionally, WPC's moisture absorption accelerates thermal weakening, whereas PVC's hydrophobic nature enhances its stability. For long-term outdoor use, PVC planters generally outperform WPC in heat resistance, though WPC offers better eco-friendliness. Choosing between them depends on climate conditions and sustainability priorities.