Materials / Compare
Plastic PPS GF40 vs. Plastic PTFE
Compare Plastic PPS GF40 vs. Plastic PTFE strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | 9MPasourcetypical yield strength at 23 °C (Teflon PTFE, Table 8) |
| Ultimate tensile strength | 195MPasourcetensile strength, 5 mm/min | 39.3MPasourcetypical, skived tape 0.13 mm |
| Flexural strength | 285MPasourceflexural strength at break | not sourced |
| Elongation at break | 1.9%sourcestrain at break, 5 mm/min | 350%sourcetypical, skived tape 0.13 mm |
| Young's modulus (stiffness) | 14.7GPasourcetypical, 1 mm/min | not sourced |
| Density | 1,650kg/m³sourcetypical | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) |
| Strength to weight | 118kN·m/kg28.4x higher | 4.17kN·m/kg |
| Stiffness to weight | 8.91MN·m/kg | not sourced |
| Poisson's ratio | 0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific) | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) |
| Shear modulus | 5.44GPa | not sourced |
| Bulk modulus | 16.3GPa | not sourced |
| Speed of sound | 2,985m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific) | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen |
| Thermal expansion | 12µm/m·Ksourceparallel (flow), mean -50 to 90 °C | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) |
| 100 mm part over a 50 °C swing | 60µm growth8.33x less | 500µm growth |
| Specific heat | not sourced | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) |
| Heats up and cools (diffusivity) | not sourced | 0.0827mm²/s |
| Thermal shock resistance | 144W/m | not sourced |
| Melting point | 280°CsourceDSC, 10 °C/min | 327°Csourcesecond melting peak (sintered polymer), +/-10 |
| Glass transition | 90°CsourceDSC, 10 °C/min | not sourced |
| Max service temperature | 270°CsourceHDT 1.8 MPa | 260°Csourceservice temperature (Chemours general Teflon PTFE statement) |
| Values for | Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013). | Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape) |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Plastic PPS GF40 stronger than Plastic PTFE?
Plastic PPS GF40 is stronger: its tensile strength is 195 MPa against yield strength 9 MPa for Plastic PTFE (21.7x).
Which is lighter, Plastic PPS GF40 or Plastic PTFE?
Plastic PPS GF40 is lighter: 1,650 kg/m³ against 2,160 kg/m³ for Plastic PTFE.
Which is lighter for the same job, Plastic PPS GF40 or Plastic PTFE?
For the same stiffness or strength: Plastic PPS GF40 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic PPS GF40 | Plastic PTFE |
|---|---|---|
| Strong rod or tie | lighter | 28.4x heavier |
| Strong beam | lighter | 10.2x heavier |
| Strong panel or plate | lighter | 6.09x heavier |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Plastic PPS GF40 or Plastic PTFE?
Plastic PTFE conducts heat better: 0.25 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
Plastic PPS GF40 expands less: 12 µm/m·K against 100 µm/m·K for Plastic PTFE.