How does resin antioxidant content affect oxidation induction time in WPC flower boxes?

The oxidation induction time (OIT) of Wood-Plastic Composite (WPC) flower boxes is a critical measure of their resistance to oxidative degradation, which directly impacts their longevity and performance. Resin antioxidants play a pivotal role in extending OIT by inhibiting the chain reactions that lead to polymer breakdown.

Higher antioxidant content in the resin matrix significantly delays the onset of oxidation, as these additives scavenge free radicals and interrupt the propagation of oxidative damage. Studies show that WPC flower boxes with optimized antioxidant levels exhibit up to 40% longer OIT compared to untreated samples, ensuring better UV resistance and structural integrity in outdoor environments.

However, excessive antioxidant concentrations can lead to saturation effects, where additional amounts yield diminishing returns. Manufacturers must balance cost and performance by selecting the right antioxidant type (e.g., hindered phenols or phosphites) and dosage (typically 0.1–0.5% by weight) for targeted OIT improvement.

In conclusion, resin antioxidant content is a key factor in enhancing the oxidative stability of WPC flower boxes, making them more durable for prolonged outdoor use.