What are the effects of resin degradation on the load-bearing capacity of aged WPC tree boxes?

Resin degradation significantly impacts the load-bearing capacity of aged Wood-Plastic Composite (WPC) tree boxes. Over time, exposure to environmental factors such as UV radiation, moisture, and temperature fluctuations causes the polymer matrix in WPCs to break down. This deterioration weakens the composite's structural integrity, leading to reduced stiffness, increased brittleness, and diminished mechanical strength. Studies show that aged WPC tree boxes with degraded resin exhibit up to 30-40% lower load-bearing capacity compared to newer installations. Additionally, microcracks and fiber-matrix debonding further accelerate failure under stress. Proper material selection, UV stabilizers, and protective coatings can mitigate these effects, extending the lifespan of WPC tree boxes in urban landscapes.