What are the characteristics of PPS board?

What are the characteristics of PPS board?

PPS board characteristics: the air promised to work at a very high temperature can continue to work at 220 ℃, a short period of time up to 260 ℃, in a high-temperature environment to maintain high mechanical strength, stiffness and hardness, excellent chemical corrosion resistance and hydrolysis resistance (now no solvents found below 200 ℃ solubility Polyphenylene Sulfide, inorganic acids, alkalis and salts of strong resistance), excellent wear resistance and conflict, very good dimensions stability, excellent resistance to high-energy radiation, outstanding anti-ultraviolet function, itself has a flame retardant, excellent electrical insulation.

The usual function: PPS is a white appearance, high crystallinity, hard and brittle polymer, pure PPS relative {HotTag} density of 1.3, but after modification will be increased.PPS has a very small water absorption, usually as little as 0.03%.PPS flame retardant, its oxygen index is as high as 44% or more; compared with other plastics, it is high in the plastics flame retardant materials (pure PVC oxygen index is 47%, PVC oxygen index of 47%, PPS oxygen index of 47%, PVC oxygen index of 47%, and so on). Oxygen index of 47%, PSF for 30%, Pa66 for 29%, MPPO for 28%, PC for 25%).

Mechanical function: pure PPS mechanical function is not high, especially low impact strength. To glass fiber reinforcement will be a big improvement in impact strength and tensile strength, tensile strength > 170MPa, flexural strength > 220MPa, notched impact strength > 16MPa. PPS rigidity is very high, rare in engineering plastics. Pure PPS flexural modulus up to 3.8Gpa, inorganic filler modification can reach 12.6Gpa, increased by 5 times. And the rigidity of the famous PPO is only 2.55Gpa, PC is only 2.1Gpa. PPS has excellent creep resistance and fatigue resistance, good creep resistance under load. High exterior hardness, Rockwell hardness > 100HR; high wear resistance, its 1000 rpm wear is only 0.04g, after filling fluorine resin and molybdenum disulfide and other lubricants, can be a big improvement in its wear resistance, the conflict coefficient of 0.01 ~ 0.02. PPS also has a certain degree of self-lubricating properties. the mechanical function of the PPS on the temperature of the sensitivity of the function is small.

Thermal function: PPS has excellent thermal function, its melting point exceeds 280 ℃, the heat distortion temperature exceeds 260 ℃, short-term 260 ℃, and can be used for a long time at 200 ℃. In the air at 700 ℃ degradation, inert gas at 1000 ℃ still adhere to 40% of the component. After special modification of the species, the heat distortion temperature can reach 350 ℃ or more.

Electrical function: PPS electrical function is very outstanding, compared with other engineering plastics, its dielectric constant and dielectric loss angle tangent value is relatively low, and in the larger frequency, temperature and temperature range change is not large; PPS arc resistance is good, can be compared with thermosetting plastics. pps is commonly used in electrical Insulation Materials, the amount of which can be accounted for 30% of the cloth.

Chemical resistance: one of the characteristics of PPS is good chemical resistance, its chemical stability function is second only to F4; PPS on most acids, esters, ketones, aldehydes, phenols and aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, etc. stability, and now there is no solvents found to dissolve the polyphenylene sulfide at 200 ℃ or less, the inorganic acids, alkalis and salts resistance is very strong. It is not resistant to chlorinated biphenyl, oxidizing acid, oxidizing agent, concentrated sulfuric acid, concentrated nitric acid, aqua regia, hydrogen peroxide and sodium hypochlorite.