Plastic LCP GF30 vs. Plastic UHMWPE

Compare Plastic LCP GF30 vs. Plastic UHMWPE strength, stiffness, weight and thermal properties.

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Plastic LCP GF30Bulk polymer (molded or machined)

Plastic UHMWPEBulk polymer (molded or machined)

Mechanical
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Yield strength	not given (tensile used)	20MPasourcetypical, tensile stress at yield ISO 527, 50 mm/min
Ultimate tensile strength	115MPasourcetensile strength (ISO 527)	43MPasourcetypical, tensile stress at break ISO 527, 50 mm/min
Flexural strength	184MPasourcetypical (ISO 178)	not sourced
Elongation at break	1.5%sourcetensile elongation (ISO 527)	465%sourcetypical, nominal elongation at break ISO 527
Young's modulus (stiffness)	11.5GPasourcetensile modulus (ISO 527)	0.66GPasourcetypical, tensile modulus ISO 527, 1 mm/min
Density	1,610kg/m³sourcetypical	930kg/m³sourcetypical1.73x lighter
Strength to weight	71.4kN·m/kg3.32x higher	21.5kN·m/kg
Stiffness to weight	7.14MN·m/kg10.1x higher	0.71MN·m/kg
Poisson's ratio	not sourced	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	2,673m/s	842m/s
Thermal
Thermal conductivity	0.5W/m·Ksourcehot disk (ISO 22007-2), temperature not stated	0.4W/m·Ksourcetypical, unfilled (narrative value, generic Celanese UHMWPE)
Thermal expansion	20µm/m·Ksourceflow direction (MD), mean 50-150 °C	200µm/m·Ksourcetypical, 20 to 100 °C (generic Celanese UHMWPE)
100 mm part over a 50 °C swing	100µm growth10x less	1,000µm growth
Specific heat	839J/kg·KsourceASTM E1269, temperature not stated	not sourced
Heats up and cools (diffusivity)	0.37mm²/s	not sourced
Thermal shock resistance	not sourced	not sourced
Melting point	not sourced	130–138°CsourceDSC 10 K/min
Max service temperature	288°CsourceHDT 1.8 MPa (ISO 75)	80°Csourcerecommended max constant operating temperature
Values for	Sumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical values.	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 LCP GF30 stronger than Plastic UHMWPE?

Plastic LCP GF30 is stronger: its tensile strength is 115 MPa against yield strength 20 MPa for Plastic UHMWPE (5.75x).

Which is lighter, Plastic LCP GF30 or Plastic UHMWPE?

Plastic UHMWPE is lighter: 930 kg/m³ against 1,610 kg/m³ for Plastic LCP GF30.

Which is stiffer, Plastic LCP GF30 or Plastic UHMWPE?

Plastic LCP GF30 is stiffer: Young's modulus 11.5 GPa against 0.66 GPa for Plastic UHMWPE, so the same part in Plastic LCP GF30 deflects less under the same load.

Which is lighter for the same job, Plastic LCP GF30 or Plastic UHMWPE?

For the same stiffness or strength: Plastic LCP GF30 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 LCP GF30	Plastic UHMWPE
Stiff rod or tie (tension)	lighter	10.1x heavier
Stiff beam (bending)	lighter	2.41x heavier
Stiff panel or plate	lighter	50% heavier
Strong rod or tie	lighter	3.32x heavier
Strong beam	lighter	1.85x heavier
Strong panel or plate	lighter	39% 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 LCP GF30 or Plastic UHMWPE?

Plastic LCP GF30 conducts heat better: 0.5 W/m·K against 0.4 W/m·K for Plastic UHMWPE.

Which expands less with temperature?

Plastic LCP GF30 expands less: 20 µm/m·K against 200 µm/m·K for Plastic UHMWPE.

Among 72 materials

Stiffness against density

Strength against density