How does the addition of antioxidants prevent chain scission in polyethylene?
Polyethylene, a widely used polymer, is susceptible to chain scission—a breakdown of its molecular structure—due to oxidation. Antioxidants play a crucial role in preventing this degradation by neutralizing free radicals generated during oxidation. These additives interrupt the chain reaction that leads to polymer breakdown, thereby preserving the material's mechanical properties and extending its lifespan. By stabilizing the polymer matrix, antioxidants reduce the formation of carbonyl groups and other oxidative byproducts that weaken polyethylene. This mechanism is vital for applications requiring long-term durability, such as packaging, piping, and automotive components. Understanding this process helps optimize polyethylene formulations for enhanced performance.
