Polyphenylene sulfide (PPS) exhibits excellent comprehensive properties in chemical and high temperature environments, including wear resistance, high load capacity and dimensional stability. In addition, the PPS profiles with good compactness, good hardness and excellent chemical corrosion resistance is widely used in a variety of industrial equipment, such as industrial drying and food processing ovens, chemical equipment, mechanical bearings and electrical insulation systems. PPS profiles can be used for a long time at 220℃, and there is no solvent that can dissolve PPS at 200℃, so PPS is quite good even at high temperature for inorganic acid, alkali, salt and other corrosion resistance. Without the addition of flame retardant, PPS in the UL94 combustion test for V-0/5V is the highest grade.
| Product name | PPS | PEI | PAI | PSU | PES | |
|---|---|---|---|---|---|---|
| Project | Units | Test data | ||||
| Density | Kg/m3 | 1430 | 1270 | 1450 | 1240 | 1370 |
| Water absorption: | ||||||
| Soak in water at 23℃ for 24 hours | % | 0.01/0.03 | 0.26/0.54 | 0.21/- | ||
| In 23℃/50%RH air | % | 0.03 | 0.75 | 1.9 | 0.2 | 0.6 |
| Soak in water at 23℃ | % | 0.09 | 1.35 | 3.5 | 0.8 | 2 |
| Thermal performance: | ||||||
| Melting point | ℃ | 280 | NA | NA | NA | NA |
| Thermal conductivity at 23℃ | W/(K.m) | 0.3 | 0.22 | 0.54 | 0.25 | 0.18 |
| Coefficient of thermal expansion of cable: | ||||||
| Average value between 23-100℃ | m/(m.k) | 50×10-6 | 45×10-6 | 25×10-6 | 56×10-6 | 55×10-6 |
| Average value between 23-150℃ | m/(m.k) | 60×10-6 | 45×10-6 | 25×10-6 | ||
| Average value above 150℃ | m/(m.k) | 80×10-6 | 45×10-6 | 25×10-6 | ||
| Maximum allowable working temperature in air: | ||||||
| Short time | ℃ | 260 | 200 | 270 | 180 | 220 |
| Continuous: At least 20,000 | ℃ | 220 | 170 | 250 | 160 | 190 |
| Combustibility: “Oxygen index | ||||||
| According to UL94(1.5/3mm thick) | % | 47 | 47 | 44 | V0 | V0 |
| Mechanical properties at 23℃: | ||||||
| Applied experiment: | ||||||
| Bending tensile stress/breaking tensile stress | MPa | /75 | 105/- | /80 | 80 | 90 |
| Tensile stress at break | % | 5 | 10 | 5 | 6.5 | 50 |
| Tensile modulus of elasticity | MPa | 3700 | 3400 | 5800 | 2600 | 2700 |
| Compression experiment: | ||||||
| Compressive stress at 1% normal strain | MPa | 28 | 25 | 31 | 22 | 20 |
| Compressive stress at 2% normal strain | MPa | 55 | 49 | 58 | ||
