What is the characteristic of PPS material?
The professional term for PS plastics in the industry is: polyphenylene sulfide. From a physical appearance, the product is a white, hard and brittle polymer. From a chemical point of view, it has a high degree of crystallinity. In research and practical applications, it can Know that it is a special thermoplastic engineering plastic with excellent comprehensive properties. High temperature resistance, corrosion resistance and excellent mechanical properties are the biggest features, which makes it suitable for many complicated occasions.
So what is PPS? Modified PPS is actually a sulfur-containing aromatic polymer. The relative density of polyphenylene sulfide without impurities is 1.3, which generally increases after modification. At the point of water absorption, The water absorption of the modified PPS is generally only about 0.03%, which is small. And compared with other plastics, modified PPS is a high flame retardant material, such as compared to PVC, PA66.
Modified PPS plastic
What are the main properties of modified PPS plastics?
Modified PPS has very low dielectric constant and dielectric loss. Surface resistivity and volume resistivity are insensitive to changes in frequency, temperature, and humidity. Polyphenylene sulfide is an excellent electrical insulation material. Modified PPS plastic has excellent thermal properties. The thermal performance index after modification by adding long glass fiber is high.
Modified PPS plastic can also maintain high mechanical properties and dimensional stability under long-term working load and heat load, and can be used in high temperature stress environment. It also has good anti-radiation performance, and its anti-radiation performance reaches Gy 1 × 108. It is a new material unmatched by other engineering plastics. Moreover, the modified PPS plastic has excellent electrical insulation properties, and the volume resistivity of PPS grade materials with long carbon fibers is relatively low.
Adding long glass fibers and long carbon fibers can improve the mechanical properties of modified PPS plastics. Modified PPS plastic maintains high mechanical properties and dimensional stability under long-term working load and thermal load, and can be used in high temperature stress environment. In addition, its chemical stability is very good, in addition to concentrated sulfuric acid, concentrated nitric acid, aqua regia and other strong oxidizing acids, it is not subject to corrosion by most acid and alkali salts, and its chemical stability is close to polytetrafluoroethylene.
Other performance characteristics:
1. Mechanical properties: The mechanical properties of PPS raw materials are not high, especially the impact strength is relatively low. After adding long fibers for modification and enhancement, the impact strength will be greatly improved.
2. Tensile strength: The tensile strength of the modified PPS is increased from 6Mpa to 137Mpa, several times.
3. The modified PPS plastic has good creep resistance under load, high hardness, and high wear resistance.
The application fields of modified PPS plastics are:
Automotive field: water pump impeller, carburetor, exhaust device, exhaust regulating valve, light reflector, bearing, sensing component and other accessories.
Electronic and electrical field: various high-voltage components, sockets, terminals, motor starting coils, blades, brush brackets and rotor insulation parts, contact switches, relays, hair dryers, and other home appliance parts.
Machinery industry: used as bearings, pumps, valves, pistons, precision gears, instrumentation parts, etc.
Chemical industry: acid, alkali resistant valves, pipes, fittings, valves, and other special corrosion resistant parts.