Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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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).
Plastic UHMWPE
Celanese GUR 4120 (avg. molecular weight 4.7x10^6 g/mol), typical values on compression-molded specimens; CTE and thermal conductivity from Celanese's generic UHMWPE guide (grade not named)
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GUR UHMW-PE Overview (GUR-015)CelanesePlastic UHMWPE · Yield strength: typical, tensile stress at yield ISO 527, 50 mm/minPlastic UHMWPE · Ultimate tensile strength: typical, tensile stress at break ISO 527, 50 mm/minPlastic UHMWPE · Elongation at break: typical, nominal elongation at break ISO 527Plastic UHMWPE · Young's modulus (stiffness): typical, tensile modulus ISO 527, 1 mm/minPlastic UHMWPE · Density: typicalPlastic UHMWPE · Melting point: DSC 10 K/minPlastic UHMWPE · Max service temperature: recommended max constant operating temperature
GUR UHMW-PE Polymer Guide (GUR-003)Celanesearchived copyPlastic UHMWPE · Thermal conductivity: typical, unfilled (narrative value, generic Celanese UHMWPE)Plastic UHMWPE · Thermal expansion: typical, 20 to 100 °C (generic Celanese UHMWPE)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Plastic PPS GF40 stronger than Plastic UHMWPE?
Plastic PPS GF40 is stronger: its tensile strength is 195 MPa against yield strength 20 MPa for Plastic UHMWPE (9.75x).
Which is lighter, Plastic PPS GF40 or Plastic UHMWPE?
Plastic UHMWPE is lighter: 930 kg/m³ against 1,650 kg/m³ for Plastic PPS GF40.
Which is stiffer, Plastic PPS GF40 or Plastic UHMWPE?
Plastic PPS GF40 is stiffer: Young's modulus 14.7 GPa against 0.66 GPa for Plastic UHMWPE, so the same part in Plastic PPS GF40 deflects less under the same load.
Which is lighter for the same job, Plastic PPS GF40 or Plastic UHMWPE?
For the same stiffness or strength: Plastic PPS GF40 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic PPS GF40
Plastic UHMWPE
Stiff rod or tie (tension)
lighter
12.6x heavier
Stiff beam (bending)
lighter
2.66x heavier
Stiff panel or plate
lighter
1.59x heavier
Strong rod or tie
lighter
5.5x heavier
Strong beam
lighter
2.57x heavier
Strong panel or plate
lighter
1.76x 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 is more ductile, Plastic PPS GF40 or Plastic UHMWPE?
Plastic UHMWPE stretches further before it breaks: 465% elongation at break against 1.9% for Plastic PPS GF40.
Thermal
Which conducts heat better, Plastic PPS GF40 or Plastic UHMWPE?
Plastic UHMWPE conducts heat better: 0.4 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 200 µm/m·K for Plastic UHMWPE.