Polyphenylensulfide (PPS) is a linear, semi-crystalline thermoplastic with exceptional mechanical strength, thermal stability, and chemical resistance. It has a typical operating temperature of up to +300 °F, making it a suitable choice for high-temperature applications. PPS offers high dimensional stability and creep strength, and its Limiting Oxygen Index (LOI) is one of the highest among polymers, indicating excellent flame resistance. When reinforced with glass fibers, PPS achieves a strength comparable to light metal, bridging the gap between technical plastics and PEEK with its strength and cost-effectiveness.
Properties of PPS
PPS has a unique set of properties that make it suitable for a wide range of industrial applications:
- Very high strength and rigidity: PPS exhibits high mechanical strength and rigidity, making it suitable for demanding applications.
- High hardness: PPS has a high hardness level, ensuring durability and resistance to wear and tear.
- High thermostability: PPS can withstand high temperatures, maintaining its properties up to +300 °F.
- High dimensional stability: PPS has minimal expansion or contraction with changes in temperature, ensuring consistent performance.
- Very high chemical resistance: PPS resists a wide range of chemicals, making it suitable for harsh environments.
- Very good insulating properties: PPS offers excellent electrical insulation, making it suitable for electronic applications.
- High weather resistance: PPS can withstand various weather conditions, allowing for outdoor use.
- High resistance to hydrolysis: PPS has a high resistance to moisture and hydrolysis, ensuring durability in humid environments.
- Very low moisture absorption: PPS absorbs minimal moisture, maintaining its stability and structural integrity.
Applications of PPS
Due to its unique properties, PPS is used in a variety of industrial and engineering applications:
- Components in machine-making: PPS’s high strength and rigidity make it ideal for various machine components.
- Pump parts: PPS’s chemical resistance and thermostability are suitable for pump components in industrial settings.
- Fan parts: PPS’s strength and thermal resistance make it ideal for fan components and impellers.
- Impellers: PPS’s high mechanical strength and rigidity make it suitable for impeller manufacturing.
- Parts in the fuel and automotive sector: PPS’s high thermostability and chemical resistance make it ideal for automotive applications.
- Valve seats and valve seals: PPS’s high strength and dimensional stability make it ideal for valve components.
Conclusion
GEHR PPS® is a high-performance thermoplastic known for its high mechanical strength, thermostability, chemical resistance, and dimensional stability. Its unique combination of properties makes it suitable for various industrial applications, from machine components to automotive parts. With its low moisture absorption, high resistance to hydrolysis, and excellent insulating properties, PPS is a versatile material that meets the needs of demanding engineering projects.