Antioxidant Tutorial, 1998 Polymers, Laminations & Coatings Conference Proceedings
Traditional stabilization systems for polyoiefins are typically based on a combination of a phenolic antioxidant and a phosphorus based melt processing stabilizer. The phenoiic antioxidant provides melt processing stability as a hydrogen atom donor and free radical scavenger, but is also primarily incorporated for some level of long term thermal stability. The phosphorus based melt processing stabilizer, usually a phosphite or phosphonite, functions as a hydroperoxide decomposer during the melt compounding step. New antioxidants based on hydroxyiamine and lactone chemistry have also been recently introduced. if the polymer contains acidic residues from the polymerization catalyst, then a variety of acid scavengers can be used as well.
Antioxidant Tutorial, 1998 Polymers, Laminations & Coatings Conference Proceedings