POLYPHENYLENE OXIDE (PPO)

Polyphenylene Oxide (PPO) was discovered by Dr. Allan Hay, a chemist at General Electric (GE), in 1956. Dr. Hay developed a method to synthesize PPO through the oxidative coupling of phenol, using a copper-based catalyst. This discovery led to the creation of a polymer with exceptional thermal stability, mechanical strength, and electrical insulating properties.

PPO is often blended with other polymers, such as polystyrene (PS), to improve its processability and expand its range of applications. These blends are used in automotive parts, electrical and electronic components, and various consumer goods due to their balanced properties and performance.

Pictured above are several components for the washroom controls industry and valve components. Most have complex features and threads highlighting the great dimensional stability PPO (particularly glass filled) offers.

Why choose PPO for your injection moulding project?

  • 1. High strength and stiffness: PPO has a high modulus of elasticity which results in a material that is strong and rigid.
  • 2. Chemical resistance: PPO is resistant to many chemicals, including acids, bases, and solvents, making it ideal for use in harsh environments.
  • 3. Low moisture absorption: PPO has a low level of moisture absorption, which means that it doesn't absorb water easily. This feature allows it to maintain its mechanical properties under different conditions.
  • 4. Electrical properties: PPO has good electrical properties, making it suitable for electrical applications.
  • 5. Dimensional stability: PPO has excellent dimensional stability, which means that it retains its shape even when subjected to changes in temperature and humidity.
  • 6. Ease of processing: PPO can be easily processed by injection moulding, which is a cost-effective method for producing complex parts.
  • 7. Good thermal properties: PPO has good heat resistance, which makes it suitable for high-temperature applications.
  • 8. Flame resistance: PPO has good flame retardant properties, which makes it suitable for use in applications that require a high level of fire protection.

Overall, PPO is a versatile material that offers many benefits for injection moulding applications. 

If you have an injection moulding project and are considering using PPO, please get in touch with our technical team on 01280 706335 for a free consultation!

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