Polyphenylene oxide alloys have low moisture absorption levels, giving them good electrical properties over a wide range of humidity and temperature ranges. The materials sport good chemical resistance, though softening and cracking can occur with exposure to some organic chemicals.
PPO blends show increased stiffness with the addition of glass and carbon fibers. Improved strength and flame retardancy, along with reduced mold shrinkage, can be gained with the addition of other additives. Uses of these blends include thermal housing, bases for household appliances and electronics, as well as high temperature piping for fluid contact areas.