What are the oxidation induction time tests for polypropylene outdoor seating?

Oxidation Induction Time (OIT) tests are critical for evaluating the thermal oxidative stability of polypropylene used in outdoor seating. This test measures the time it takes for a material to oxidize under controlled high-temperature conditions, simulating long-term exposure to sunlight and weather. For polypropylene outdoor furniture, OIT testing helps ensure resistance to degradation, extending product lifespan. Common methods include differential scanning calorimetry (DSC), where samples are heated in an oxygen-rich environment. Higher OIT values indicate better antioxidant performance, crucial for maintaining mechanical properties and color stability in outdoor applications. Manufacturers rely on OIT data to select appropriate stabilizers and validate material quality for durable outdoor seating solutions.