PPO

Polyphenylene Oxide (PPO)

Polyphenylene Oxide (PPO) is an amorphous, inherently flame-retardant engineering thermoplastic that offers an excellent balance of dimensional stability, low moisture absorption, dielectric strength, and heat resistance. In practice it is often blended with polystyrene (PPE/PS) to improve processability while retaining PPO’s core performance.

Typical Grades

Model	Modification Type	Additives	Key Performance Indicators	Main Application Areas
WL-PPO-GF30	30% Glass Fiber Reinforced	Glass Fiber, 30%	High rigidity/strength (flexural modulus >9 GPa), HDT ≈ 200 °C, low warpage	Automotive under-hood brackets, pump housings, structural E&E parts
WL-PPO-FR20(V0)	Halogen-Free Flame Retardant V-0	HFFR Package, 15-20%	UL94 V-0 @ 1.6 mm, CTI ≥ 600 V, maintains dielectric properties	High-voltage connector blocks, smart-meter enclosures, relay bases
WL-PPO-IM	Impact Modified (Toughened)	Elastomer Modifier, 10-20%	Notched Izod ≥ 60 J/m at 23 °C, good low-temperature impact, balanced flow	Snap-fit appliance parts, battery casings, power-tool housings
WL-PPO-UV	UV Stabilised Weatherable	UV Stabiliser, 0.5-1.5%	Improved colour retention (∆E<3 after 1 000 h Q-SUN), surface gloss stability	Outdoor junction boxes, automotive exterior trims requiring paint-free use