poly(phenylene oxide)

polymer

Poly(phenylene oxide), commonly known as PPO, is an engineering thermoplastic polymer characterized by a rigid aromatic backbone that imparts exceptional thermal stability and dimensional consistency. It is widely used in demanding applications requiring high-temperature performance, chemical resistance, and electrical insulation, particularly in automotive fuel systems, appliance housings, electrical connectors, and HVAC components where it often replaces metals or lower-performing plastics. PPO is valued for its combination of stiffness, low moisture absorption, and long-term heat resistance, making it a preferred choice when cost-effective thermal performance is needed without the brittleness of phenolic thermosets or the weight penalty of metal alternatives.

automotive fuel system componentselectrical connectors and insulatorsappliance housingsHVAC ducting and fittingschemical resistant containershigh-temperature structural parts

Compliance & Regulations

?UL 94?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Glass Transition Temperature(Tg)
—
K——
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Safety & Biocompatibility

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.