Polyphenylene Sulfide (PPS)
Polyphenylene Sulfide (PPS) is a high-performance semi-crystalline engineering thermoplastic recognized for its excellent chemical resistance, dimensional stability, and consistent performance at elevated temperatures. Its inherently rigid molecular structure allows PPS to maintain mechanical integrity and precision in harsh chemical and thermal environments.
PPS is widely used in applications requiring long-term stability, corrosion resistance, and tight tolerances, particularly where metals suffer from corrosion or excessive weight. It is commonly specified for components exposed to chemicals, heat, and continuous service conditions.
PPS Properties Overview
PPS offers a well-balanced combination of thermal, chemical, and mechanical performance. While it does not reach the extreme temperature capability of PEEK or polyimide, PPS provides reliable performance in demanding environments at a more economical cost.
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Mechanical Strength & Toughness
- High stiffness and good tensile strength
- Excellent creep resistance under continuous load
- Low thermal expansion supports precision components
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Temperature Performance
- Continuous operating temperature up to 425 °F (220 °C)
- Maintains stiffness and dimensional stability at elevated temperatures
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Moisture & Environmental Resistance
- Extremely low moisture absorption
- Maintains properties in humid and wet environments
- Resistant to hydrolysis
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Chemical Resistance
- Excellent resistance to acids, bases, solvents, fuels, and hydrocarbons
- Suitable for corrosive and chemically aggressive environments
Our Product Offering
- Virgin PPS
- Glass Filled PPS
- Carbon Filled PPS
Markets Served
- Heavy Industry
- Semiconductor
- Chemical Processing
- Electrical & Electronics
- Medical
Typical Products and Applications
| Products |
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- Semi-finished forms: Rods, Sheets & Tubes
- Machined components
- Electrical Insulating Parts
- Structural and Wear Components
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| Applications |
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- CMP Retaining Rings
- IC Test Sockets
- Compressors
- Valves
- Pumps
- Slide Bearings
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Limitations of PPS
- Lower impact strength compared to nylon and UHMWPE
- More brittle in unfilled grades
- Limited wear performance without fillers
- Not suitable for applications requiring extreme toughness
PPS vs Other Materials
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PPS vs PEEK
- PEEK offers higher temperature capability and superior fatigue resistance, while PPS provides excellent chemical resistance and dimensional stability at a lower cost.
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PPS vs Nylon
- PPS offers significantly better chemical resistance, lower moisture absorption, and higher temperature capability, whereas nylon provides better toughness and impact resistance.
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PPS vs Metal
- PPS eliminates corrosion and reduces weight while maintaining dimensional stability, though metals remain necessary for high structural loads.
When Should You Choose PPS?
PPS is typically selected when:
- Chemical resistance is a primary requirement
- Parts operate continuously at elevated temperatures
- Low moisture absorption and dimensional stability are critical
- Metal replacement is desired to avoid corrosion
Frequently Asked Questions About PPS
Is PPS suitable for chemically aggressive environments?
Yes. PPS is highly resistant to a wide range of acids, bases, solvents, and fuels.
Can PPS be used at elevated temperatures continuously?
Yes. PPS can operate continuously up to approximately 425 °F (220 °C) depending on grade.
Is PPS dimensionally stable in humid environments?
Yes. PPS absorbs very little moisture and maintains its mechanical and electrical properties in humid conditions.