PPS (Polyphenylene Sulfide) is a high-performance engineering thermoplastic with an excellent combination of properties. In simple terms, it's often seen as a more cost-effective alternative to PEEK (Polyether Ether Ketone)-retaining most of PEEK's core performance but at a fraction of the cost, sometimes as low as one-tenth.
Key Properties
The outstanding performance of PPS comes from its unique molecular structure-rigid benzene rings combined with flexible sulfide ether linkages-giving it these "all-around" characteristics:
| Property | Description |
|---|---|
| High-Temperature Resistance | Long-term use at 200–240°C, short-term up to 260°C; heat deflection temperature ranges from 115°C (neat resin) to over 260°C (modified grades) under 1.8 MPa load |
| Inherent Flame Retardancy | Achieves UL94 V-0 rating without additives-self-extinguishing when removed from flame |
| Chemical Resistance | Highly resistant to most acids, bases, and organic solvents; chemical stability is second only to PTFE (Teflon) |
| Dimensional Stability | Extremely low moisture absorption (approx. 0.02–0.03%), maintaining high precision even in humid or high-temperature environments |
| Excellent Electrical Properties | Low dielectric constant and dissipation factor, ideal for high-frequency signal transmission applications |
Major Applications
Thanks to these properties, PPS has become a critical material across multiple high-end industries:
New Energy Vehicles (NEVs) – Insulation frames, connectors, busbars for battery, motor, and power electronics; also used in electronic water pumps, valves, and thermal management systems
Electronics & AI Servers – CPU/GPU sockets, high-speed connector housings, capable of withstanding high temperatures generated by high power consumption
Industrial & Environmental – Corrosion- and wear-resistant pump casings, impellers, valves; also used in industrial filtration bags for flue gas treatment
Emerging Fields – Expanding into 5G/6G communications (low-dielectric antenna substrates), humanoid robots (lightweight components), and low-altitude aircraft (eVTOL/drones