PPS

Thermal properties

The thermal properties of polyphenylene sulphide are a key feature that enable its use in high-temperature applications. PPS retains its robust strength and mechanical properties at temperatures well above 200 °C. This is particularly relevant in industrial processes where materials are exposed to high temperatures. The melting temperature of PPS is between 290 °C and 320 °C, making it a suitable material for demanding thermal applications. Another advantage is the inherent flame resistance of PPS, which is beneficial in many safety-critical applications. The material meets the stringent requirements of UL94 V0 and, depending on the compound modification, can even achieve category 5VA.

Mechanical properties

The mechanical properties of PPS are just as impressive as its thermal capabilities. Polyphenylene sulphide has high strength, stiffness and hardness, making it a preferred material for mechanically stressed components. Even in hot and humid environments, PPS retains its good dimensional stability, which is essential for applications where precise dimensions must be maintained. This stable mechanical performance makes PPS particularly useful in the automotive and electronics industries, where mobility and strength requirements are particularly important.

Chemical resistance

PPS is known for its excellent chemical resistance, which makes it resistant to many types of solvents, acids and alkalis. This resistance is maintained even at high operating temperatures, making it particularly resistant to lubricating greases, fuels, methanol and water up to 100 °C. In addition, PPS is resistant to hydrolysis, which is advantageous in humid environments. While PPS has limited resistance to non-oxidising acids, it remains largely impervious to most liquids and gases, making it a preferred polymer for chemically demanding applications.

Other specific properties

Polyphenylene sulphide offers excellent electrical insulation properties, making it ideal for technical applications. The material has a low melt viscosity, which allows for easy processing in injection moulding. PPS offers reinforced variants that are supplemented with glass fibres or other materials to increase mechanical strength. PPS is also characterised by its UV resistance and remains stable against hydrolysis, which ensures its performance in humid environments. These specific properties make PPS a high-performance and versatile polymer.

Automotive industry: In the automotive industry, PPS is often used for the manufacture of pump housings and lamp and headlight bases. Its high thermal and chemical resistance makes it ideal for components that have to operate under extreme conditions. The low moisture absorption and excellent dimensional stability of PPS ensure that vehicle components maintain their integrity and function efficiently even under varying environmental conditions.

Electronics: In the electronics industry, PPS is used in micro-precision injection moulding, particularly for encapsulating chips and other electronic components. The excellent electrical insulation properties of PPS, combined with its ability to precisely form complex structures, make it the preferred material for the safe and reliable packaging of sensitive electronic components.

Medical technology: Medical technology benefits from the special properties of PPS, in particular its excellent sterilisability. Medical devices and instruments made from PPS not only offer high mechanical strength, but are also easy to keep sterile. These properties are essential for safe and effective use in hospitals and laboratories, where high hygiene standards are required.

Aerospace: The high-performance properties of PPS are particularly valued in the aerospace industry. Thanks to its thermal and chemical resistance, it is ideal for applications that take place under extreme conditions, such as in aircraft components or other aerospace-related equipment. PPS helps to ensure the safety and reliability of components used in high-performance environments.

Consumer goods: The versatility of PPS is also evident in the consumer goods industry. Here, it is used to manufacture durable products such as structural foam parts, films and prepregs. PPS's resistance to chemical influences and its versatility in processing make it a practical choice for many consumer goods that require robustness and durability.