Polyphenylene oxide (PPO)
Description (definition)
Polyphenylene oxide (PPO) is an engineering plastic known for its high temperature resistance, good electrical insulation and excellent dimensional stability. PPO is often processed in combination with other materials such as polystyrene (PS) as a blend to improve specific properties. Due to its versatility, PPO is used in the automotive, electrical and household appliance industries, especially where thermal and mechanical strength is required.
An example
One example of the use of PPO is in water pump housings for household appliances. The high temperature and moisture resistance of PPO ensures the durability and reliability of these components.
What role does PPO play in the household appliance industry?
In household appliances, PPO is used for components such as dishwasher parts and coffee machine housings. It can withstand high temperatures, moisture and chemical cleaning agents, which ensures a long service life for the appliances.
Is PPO recyclable?
Yes, PPO can be recycled, especially if it is available in pure form or as a blend with polystyrene (PS). Recycled PPO is often used in technical components that do not require the highest material quality.
What distinguishes PPO from other engineering plastics?
PPO offers a rare combination of heat resistance, chemical stability and electrical insulation properties. Compared to polyamides, it has lower moisture absorption, which makes it ideal for applications with high dimensional stability.