Antioxidants are vital components in bender processing, selective hydrogenation, and polymerization processes. They serve to inhibit or delay the oxidation of substrates, preventing undesired reactions that can lead to product degradation or undesired byproducts. In bender processing, antioxidants help maintain the stability of oils and fats, extending their shelf life. In selective hydrogenation, they aid in controlling the reaction pathway, ensuring the desired product is obtained while minimizing unwanted side reactions. In polymerization, antioxidants protect polymer chains from degradation during processing and storage, preserving their mechanical properties and overall quality.