Benefits of PPS-CF (Polyphenylene Sulfide – Carbon Fiber Reinforced Plastic)

1. High-Temperature Resistance:

• Heat Deflection Temperature: The heat deflection temperature of PPS is around 280°C, and when carbon fibers are added, the material’s heat resistance improves to 260°C to 270°C. This allows it to maintain good mechanical properties even in high-temperature environments.
• Operating Temperature Range: Regular PPS can operate in the range of -40°C to 200°C, while PPS-CF, due to its enhanced characteristics, can work at even higher temperatures, capable of withstanding up to 300°C for short periods.

2. Mechanical Properties:

• Tensile Strength: The tensile strength of PPS CF ranges from 200 MPa to 250 MPa, almost double that of unreinforced PPS (approximately 100 MPa). This gives it a much higher load-bearing capacity, making it ideal for structural parts.
• Bending Strength: The bending strength of PPS CF ranges from 250 MPa to 350 MPa, significantly increasing rigidity, making it suitable for precise mechanical and automotive parts such as engine components, bearing housings, etc.
• Tensile Modulus (Rigidity): The tensile modulus of PPS CF typically reaches 12-15 GPa, much higher than that of unreinforced PPS (around 3-5 GPa), providing better resistance to deformation.
• Impact Resistance: The impact strength of PPS CF typically ranges from 10-15 KJ/m², which is higher than that of unreinforced PPS (around 5-10 KJ/m²), indicating improved impact resistance.

3. Chemical Resistance:

• Acid and Alkali Resistance: PPS has excellent chemical resistance, able to withstand exposure to concentrated sulfuric acid, hydrochloric acid, sodium hydroxide, ammonia, and other aggressive chemicals. Carbon fiber reinforcement further enhances this resistance, making PPS-CF ideal for parts in the chemical industry.
• Solvent Resistance: PPS-CF is highly resistant to most organic solvents (such as alcohols, ethers, and ketones). Even at high temperatures, chemicals do not significantly degrade its physical properties.

4. Friction and Wear Properties:

• Friction Coefficient: The friction coefficient of PPS-CF generally ranges from 0.2 to 0.3, which offers good self-lubricating properties, making it ideal for applications with high wear conditions such as automotive drivetrains and bearings.
• Wear Rate: Under high load and friction conditions, the wear rate of PPS-CF is significantly lower than that of regular plastics and other composites, providing extended service life and maintaining surface integrity.

5. Dimensional Stability:

• Coefficient of Thermal Expansion (CTE): The coefficient of thermal expansion of PPS-CF is typically 20-30 µm/m·K, which is lower than many engineering plastics. This ensures the material’s dimensional stability even with temperature changes. This property is especially valuable for precision mechanical components used in environments with temperature fluctuations.
• Water Absorption: PPS has an extremely low water absorption rate, usually under 0.03%, and the addition of carbon fibers has minimal effect on this property. This ensures that the material will not experience dimensional changes or performance degradation due to moisture absorption.

6. Electrical Insulation Properties:

• Electrical Insulation Performance: PPS-CF retains excellent electrical insulation properties, with a volume resistivity of about 10^14 Ω·cm, making it suitable for electrical and electronic applications.
• Dielectric Constant: The dielectric constant of PPS-CF at 1 MHz is approximately 3.0, making it ideal for applications that require low dielectric loss and electrical insulation, such as high-frequency circuit boards and connectors.

7. Lightweight Characteristics:

• Density: The density of PPS-CF is about 1.45 g/cm³, which is significantly lighter than metals like aluminum (2.7 g/cm³) and steel (7.8 g/cm³). This provides a substantial weight advantage, which is beneficial in industries like aerospace and automotive, where lightweight materials help improve fuel efficiency and overall performance.

Application Areas:

PPS-CF is widely used in the following fields:

• Automotive Industry: Used in engine components, fuel systems, automotive electrical parts, bearings, gears, etc.
• Aerospace: Its high heat resistance, lightweight, and high strength make it ideal for engine components, wing structures, and other aerospace parts.
• Chemical Industry: Its excellent chemical resistance and corrosion resistance make it widely used in chemical pumps, valves, pipe liners, etc.
• Electronics and Electrical: Used extensively in high-frequency circuit boards, connectors, and insulation materials.

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