Modification of PPS
PPS has many excellent properties, but there are also injection molding more flying edges, poor product toughness and other shortcomings. In order to solve these shortcomings, can be modified to develop high-performance PPS modified materials.
1. PPS blending toughening modification
① filler reinforced grade toughening (improve thermal shock resistance)
Inorganic filler reinforced PPS filler grade with high dimensional accuracy, high rigidity, creep resistance, in the field of automotive, mechanical parts are widely used. However, glass fiber reinforced PPS and other general engineering plastics are relatively brittle, lack of toughness, so that its application is limited. In order to improve the toughness of glass fiber reinforced PPS, often using polymer alloy method. For example, PPS and elastomer alloys, neither loss of PPS itself and increased toughness.
② Non-reinforced grade toughening (ultra-high impact PPS)
Non-reinforced grade toughening is also achieved through the alloy of PPS and elastomers. the glass transition temperature of PPS is 100 ℃, so its low-temperature toughness is very poor, not suitable for use in low-temperature environments still need to be high toughness of the structure of the material. PPS after elastomer modification, PPS materials can be made at room temperature and low temperatures have a high degree of toughness, and also greatly broadens the application of the PPS field.
2. PA blend modified PPS
PPS and PA blend modification, can significantly improve the impact strength of the product, the two can be at a higher temperature to produce a very good melt mixing effect.
PC blend modified PPS, can improve the impact strength of PPS to a large extent, tensile strength and other mechanical properties, but the flame retardant and electrical properties have declined, the use of some attention.
4. PSF blend modified PPS
PSF resin has good mechanical properties, dielectric properties, chemical stability and heat resistance, but the PSF melt viscosity is large, to the molding process has brought some difficulties. PSF blended with PPS, can reduce viscosity, improve processing performance, the material can be used to manufacture gears, bearings, electrical switches, insulating covers and containers.
5
PTFE co-mingled modified PPS
PPS / PTFE co-mingled gold when excellent wear resistance and low coefficient of friction materials, especially suitable for the production of bearings, PPS-based blends than simple PPS has a higher toughness and corrosion resistance.
6.
PEEK co-mingled modified PPS
The two can be blended to improve the processing conditions of PEEK, reduce the cost of PEEK and improve the toughness of PEEK, so as to obtain a new type of high-performance composite materials that can synthesize the advantages of PPS and PEEK.
7. Polyester blend modified PPS
With high molecular weight linear polyester and PPS blend modification, can get heat resistance, high strength thermoplastic varieties, can be used in the manufacture of gears, bearings, electrical switches and insulating cover.
8. LCP blend modified PPS
In recent years, due to the special chemical structure of liquid crystal polymers with high strength, high modulus, low viscosity, easy to process and many other excellent characteristics, resulting in LCP has been a hot spot for research and development in the field of polymer research and development, PPS and LCP blending, you can get PPS reinforced composite materials.
Application of PPS
Because PPS has good heat resistance, excellent mechanical properties, and good chemical stability and water resistance, so PPS products are widely used in many fields.
1. Electronic, electrical, electrical industry applications
PPS was first used in electrical connectors and electrical parts, is due to the PPS has a high heat distortion temperature, good flame retardant, and can be molded and processed long and thin parts.
2. Applications in the automotive industry
In recent years, PPS parts in the automotive industry is used more and more, such as engine sensors and halogen lamp socket. As PPS has good chemical stability and thermal stability, just to meet the requirements of the engine temperature is high, as the fuel system shell, piping, connectors, valves and other components.
3. Optical products
Used in the production of headlights, fog lights and reflectors and other reflective mirror surface.
4. Application of anti-static products
General PPS is used as an insulating material. But in recent years, whether antistatic or conductive PPS has been used for a variety of purposes, such as, antistatic PPS for chemical pumps can be effectively avoided due to the transmission of flammable and explosive fluids resulting in the occurrence of explosive accidents.
5. appliances on the application
Because PPS has high heat resistance and good electrical properties, can be used as a small switch, the inner shell of the heater, electric doorbell, brush handle.
6. Other applications
Because PPS has good chemical stability, he has a wide range of applications in the mechanical industry, such as, the pump body and internal parts of chemical pumps, valves,
pipe fittings, some parts used in the oil field, chemical tower lining and so on.
