POLY(PHENYLENE) OXIDE

Polyphenylene oxide (PPO) is produced by the condensation of 2,6- dimethylphenol. The reaction occurs by passing oxygen in the phenol solution in presence of Cu₂Cl₂ and pyridine:

PPO is an engineering thermoplastic with excellent properties. To improve its mechanical properties and dimensional stability, PPO can be blended with polystyrene and glass fiber. Articles made from PPO could be used up to 330°C: it is mainly used in items that require higher temperatures such as laboratory equipment, valves, and fittings.