80°Csourcerecommended max constant operating temperature
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).
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)
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 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 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.