Polyphenylene Oxide: Properties, Applications & Machining

The amorphous engineering thermoplastic, polyphenylene oxide (PPO), is widely used in a variety of industries. You may be more familiar with its trade name, NORYL. PPO has a range of properties that make it a durable, strong, and low-cost plastic.

Polyphenylene Oxide Properties

If you’re considering using PPO in your plastic processing, keep these properties in mind. PPO is known for its low thermal expansion and low water absorption, in addition to its high dielectric strength. Here are its benefits:

  • Flame Resistance
  • High Dielectric Strength
  • Low Moisture Absorption Rate
  • Low Thermal Expansion
  • Flexural Strength
  • Insulated

If you are planning to use it in melt processing, it’s important to know that in relation to its high glass transition temperature, it is susceptible to thermal oxidation which can cause issues.

Applications of Polypropylene Oxide

Due to its tensile strength and high heat resistance, it is often used in high-temperature applications where a durable plastic with dimensional stability is needed, such as:

  • Covers
  • Scientific and analytical instrument components
  • Electrical components
  • Pump, valve, and fitting applications
  • Manifolds
  • Housings

Polypropylene Oxide Machining

Annealing is needed for PPO

If you want to maintain the quality of your PPO product, you’ll need to use annealing before machining it. This is because PPO may crack during machining that uses lubricants and coolants.

Tips and the Process for Machining PPO

PPO is best processed using extrusion or injection molding. Once processed, it can be hot-stamped, metalized, painted, or printed.

When processing PPO, it’s best to use water-soluble coolants, like spray mists. Not only will using a water-soluble coolant reduce wear on your tools, but it will also facilitate the highest quality surface finishes for your products.

Plastic Service Centers | Polypropylene oxide and many more polymers

If you need a reliable source of PPO that will reach your facility or facilities on time and in the volume you need, then you need to get in touch with Plastic Service Centers. With our over 4 million pounds of thermoplastic resins in stock at any given time, we have the capacity to provide you with as much material as you need to keep your processes running at full volume. Plus, our multiple warehouses are located strategically throughout the country so that we can efficiently ship to anywhere in the United States, Canada, and Mexico.

To learn more, give us a call today at (586) 788-0746   or send in an online contact form today!