PPO Resin
Polyphenylene Oxide (PPO), chemically named poly(2,6-dimethyl-1,4-phenylene oxide). Pure PPO resin appears as white or light-yellow powder/granules, non-toxic and amorphous, and belongs to the five major general-purpose engineering plastics worldwide. The abundant aromatic rings in its molecular structure endow the material with excellent rigidity, heat resistance, and dimensional stability, while the absence of strong polar groups in the molecular chain imparts outstanding electrical insulation properties and exceptionally low moisture absorption. Pure PPO exhibits a glass transition temperature (Tg) of approximately 210°C and a heat deflection temperature (HDT) up to 190°C, ranking among the highest heat-resistant unfilled thermoplastics.
Basic Parameters
Parameter | Unit | Value |
Density | g/cm³ | 1.06–1.07 |
Glass Transition Temp. (Tg) | °C | 210–215 |
Melting Point (Tm) | °C | 268 |
HDT (1.82 MPa) | °C | 190 |
Thermal Decomposition Temp. | °C | 350 |
Brittleness Temperature | °C | < -170 |
Continuous Service Temp. | °C | -40 ~ 120 |
Tensile Strength | MPa | 70–90 |
Flexural Strength | MPa | ≥ 100 |
Flexural Modulus | GPa | 2.5 |
Elongation at Break | % | 20–50 |
Notched Izod Impact | J/m | 80–100 |
Dielectric Constant (Dk) @ 1 MHz | — | 2.6–2.8 |
Dissipation Factor (Df) @ 1 MHz | — | 0.0005–0.001 |
Volume Resistivity | Ω·cm | 10¹⁶–10¹⁷ |
Dielectric Strength | kV/mm | 19–21 |
Water Absorption (24h) | % | 0.06–0.07 |
CLTE | 10⁻⁵/°C | 5.2 |
LOI | % | 29–32 |
Features：
• Outstanding heat resistance: Tg ≈ 210°C, HDT (1.82 MPa) ≈ 190°C, long-term service temperature range from -170°C to 120°C.
• Excellent electrical insulation: Dielectric constant (Dk) as low as 2.6–2.8 (1 MHz), dissipation factor (Df) only 0.0005–0.001, nearly independent of temperature, humidity, and frequency — an ideal substrate for high-frequency, high-speed communication.
• Ultra-low moisture absorption: 24-hour water absorption only ~0.06%, the lowest among the five major engineering plastics, ensuring high dimensional and performance stability in humid environments.
• Superior mechanical properties: Tensile strength 70–90 MPa, flexural strength ≥ 100 MPa, creep resistance among the best in engineering plastics.
• Inherent flame retardancy: Limiting Oxygen Index (LOI) approx. 29–32%, self-extinguishing; only minimal flame retardant additives required to achieve UL94 V-0 rating.
• Good chemical resistance: Excellent resistance to water, salt solutions, weak acids, weak alkalis, and most detergents.
• Low density and lightweight: Density only 1.06–1.07 g/cm³, among the lightest engineering plastics.
Application：
Pure PPO resin, as a base feedstock, is primarily applied in the following areas:
(1) High-Frequency Communication & Electronics:
• 5G base station radomes, high-frequency PCB copper-clad laminate matrix resin, high-speed server PCB substrate;
• Electronic connectors, relays, coil bobbins, IC packaging materials;
(2) Photovoltaic & New Energy:
• PV connectors, PV inverter housings and internal insulation components;
• New energy vehicle battery pack components, motor controller insulation parts;
(3) High-Performance Alloy/Blend Base Material:
• As the core matrix resin for PPO/HIPS, PPO/PA, PPO/PPS, and other alloy systems;
• Providing heat-resistant backbone and electrical performance foundation for downstream modified products.
(4) Coatings & Specialty Materials:
• High-performance insulating coatings, high-temperature-resistant coating base;
• Functional separation membrane material precursors.
keywords: PPO Resin
classification: Product
Polyphenylene Oxide (PPO), chemically named poly(2,6-dimethyl-1,4-phenylene oxide). Pure PPO resin appears as white or light-yellow powder/granules, non-toxic and amorphous, and belongs to the five major general-purpose engineering plastics worldwide. The abundant aromatic rings in its molecular structure endow the material with excellent rigidity, heat resistance, and dimensional stability, while the absence of strong polar groups in the molecular chain imparts outstanding electrical insulation properties and exceptionally low moisture absorption. Pure PPO exhibits a glass transition temperature (Tg) of approximately 210°C and a heat deflection temperature (HDT) up to 190°C, ranking among the highest heat-resistant unfilled thermoplastics.
Basic Parameters
Parameter | Unit | Value |
Density | g/cm³ | 1.06–1.07 |
Glass Transition Temp. (Tg) | °C | 210–215 |
Melting Point (Tm) | °C | 268 |
HDT (1.82 MPa) | °C | 190 |
Thermal Decomposition Temp. | °C | 350 |
Brittleness Temperature | °C | < -170 |
Continuous Service Temp. | °C | -40 ~ 120 |
Tensile Strength | MPa | 70–90 |
Flexural Strength | MPa | ≥ 100 |
Flexural Modulus | GPa | 2.5 |
Elongation at Break | % | 20–50 |
Notched Izod Impact | J/m | 80–100 |
Dielectric Constant (Dk) @ 1 MHz | — | 2.6–2.8 |
Dissipation Factor (Df) @ 1 MHz | — | 0.0005–0.001 |
Volume Resistivity | Ω·cm | 10¹⁶–10¹⁷ |
Dielectric Strength | kV/mm | 19–21 |
Water Absorption (24h) | % | 0.06–0.07 |
CLTE | 10⁻⁵/°C | 5.2 |
LOI | % | 29–32 |
Features：
• Outstanding heat resistance: Tg ≈ 210°C, HDT (1.82 MPa) ≈ 190°C, long-term service temperature range from -170°C to 120°C.
• Excellent electrical insulation: Dielectric constant (Dk) as low as 2.6–2.8 (1 MHz), dissipation factor (Df) only 0.0005–0.001, nearly independent of temperature, humidity, and frequency — an ideal substrate for high-frequency, high-speed communication.
• Ultra-low moisture absorption: 24-hour water absorption only ~0.06%, the lowest among the five major engineering plastics, ensuring high dimensional and performance stability in humid environments.
• Superior mechanical properties: Tensile strength 70–90 MPa, flexural strength ≥ 100 MPa, creep resistance among the best in engineering plastics.
• Inherent flame retardancy: Limiting Oxygen Index (LOI) approx. 29–32%, self-extinguishing; only minimal flame retardant additives required to achieve UL94 V-0 rating.
• Good chemical resistance: Excellent resistance to water, salt solutions, weak acids, weak alkalis, and most detergents.
• Low density and lightweight: Density only 1.06–1.07 g/cm³, among the lightest engineering plastics.
Application：
Pure PPO resin, as a base feedstock, is primarily applied in the following areas:
(1) High-Frequency Communication & Electronics:
• 5G base station radomes, high-frequency PCB copper-clad laminate matrix resin, high-speed server PCB substrate;
• Electronic connectors, relays, coil bobbins, IC packaging materials;
(2) Photovoltaic & New Energy:
• PV connectors, PV inverter housings and internal insulation components;
• New energy vehicle battery pack components, motor controller insulation parts;
(3) High-Performance Alloy/Blend Base Material:
• As the core matrix resin for PPO/HIPS, PPO/PA, PPO/PPS, and other alloy systems;
• Providing heat-resistant backbone and electrical performance foundation for downstream modified products.
(4) Coatings & Specialty Materials:
• High-performance insulating coatings, high-temperature-resistant coating base;
• Functional separation membrane material precursors.
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