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PPO
Material Type
Engineering Plastics
Material Full Name
Polyphenylene Oxide
Process Compatibility
Injection Molding, CNC Machining
Basic Properties
Property |
Parameter/Performance |
Remarks |
|---|---|---|
| Chemical Name | Polyphenylene Oxide | Aromatic ether backbone (-Ph-O-) |
| Molecular Structure | Amorphous thermoplastic | Typically blended with PS (commercial grades are PPO/PS alloys) |
| Density | 1.06~1.10 g/cm³ | 10-15% lighter than PC/ABS |
| Color | Natural amber (dark-colorable) | Opaque, high surface gloss |
| Mechanical Properties | ||
| – Tensile Strength | 50-65 MPa (pure)/70-85 MPa (modified) | High rigidity but brittle (notch-sensitive) |
| – Impact Strength | 3-5 kJ/m² (pure)/10-20 kJ/m² (modified) | HIPS blending significantly improves toughness |
| – Creep Resistance | Excellent (low long-term deformation) | Superior to PC/ABS |
| Thermal Properties | ||
| – HDT (1.82MPa) | 100-110℃ (pure)/130-145℃ (modified) | Glass-filled grades reach 160℃ |
| – Service Temperature | -40℃~120℃ (modified short-term 150℃) | UL RTI 105℃ (electrical) |
| Chemical Properties | ||
| – Hydrolysis Resistance | Exceptional (stable in boiling water) | Ideal for humid/high-temp environments |
| – Chemical Resistance | Resists acids/alkalis/alcohols; swells in aromatics/halocarbons | Dissolves in acetone/chloroform |
Processing Characteristics
Drying Essential:
- 100-110℃ for 2-4 hours (moisture <0.05%)
- Moisture causes splay marks
Melt Temperature:
- 260-300℃ (pure)/240-280℃ (modified)
Mold Temperature:
- 80-110℃ (higher temps reduce internal stress)
Special Requirements:
- High melt viscosity (needs high-pressure injection)
Common Application Areas
-
Electronics: 5G antenna covers, transformer insulators
-
Automotive: Headlight reflectors, battery module brackets
-
Medical: Sterilization tool handles, dialyzer housings
-
Industrial: Chemical pump housings, high-temp pipe flanges
PPO Modified Types
Type |
Composition/Features |
Typical Applications |
|---|---|---|
| Pure PPO | High heat/electrical resistance | High-frequency PCBs, microwave components |
| PPO/PS Blend | Improved processability/cost | Automotive dashboards, appliance housings |
| PPO/PA Blend | Enhanced oil/chemical resistance | Fuel system parts, industrial valves |
| Flame-Retardant PPO | UL94 V0 (Br/P-based) | Circuit breakers, socket housings |
| Glass-Filled PPO | 30% GF, flexural strength >200 MPa | Water pump impellers, drone frames |
Advantages & Disadvantages
Advantages |
Disadvantages |
|---|---|
| Top-tier dimensional stability (<0.1% water absorption) | Pure PPO difficult to process (requires blending) |
| Excellent high-frequency dielectric properties (low loss at 5GHz) | Poor UV resistance (needs carbon black) |
| Inherent flame retardancy (LOI 29%) | Higher cost than ABS/PP (~2-3×) |
Other Engineering Plastics Selection
POM Materials
PA Materials
PC Materials
PET Materials
PEEK Materials
FAQ Of PPO Materials
Visit our FAQ center for more questions.
What are the most notable performance advantages of PPO plastic?
PPO offers outstanding dimensional stability (water absorption <0.1%), hydrolysis resistance and dielectric properties (stable dielectric constant at high frequencies), along with inherent flame retardancy (UL94 V-0 rating).
Where are modified PPO (e.g. PPO/PS blends) primarily used?
Extensively applied in automotive electronics (connectors/sensor housings), medical sterilization equipment, water treatment components and electrical insulation parts requiring high reliability.
What are key processing considerations for PPO material?
Requires pre-drying (120℃/4+ hours), recommended injection temperature 260-300℃ with mold temperature 100-140℃. Modified PPO has better flowability than pure PPO but requires avoidance of thermal degradation.