Plastic LCP GF30 vs. Plastic PMMA

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

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Plastic LCP GF30Bulk polymer (molded or machined)

Plastic PMMABulk polymer (molded or machined)

Mechanical
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Yield strength	not given (tensile used)	not given (tensile used)
Ultimate tensile strength	115MPasourcetensile strength (ISO 527)	80MPasourcetypical, 23 °C
Compressive strength	not sourced	110MPasourcecompressive yield stress, typical
Flexural strength	184MPasourcetypical (ISO 178)	115MPasourcetypical
Elongation at break	1.5%sourcetensile elongation (ISO 527)	5.5%sourcetypical
Young's modulus (stiffness)	11.5GPasourcetensile modulus (ISO 527)	3.3GPasourcetypical, short-term
Density	1,610kg/m³sourcetypical	1,190kg/m³sourcetypical35% lighter
Strength to weight	71.4kN·m/kg6% higher	67.2kN·m/kg
Stiffness to weight	7.14MN·m/kg2.58x higher	2.77MN·m/kg
Poisson's ratio	not sourced	0.37sourcetypical
Shear modulus	not sourced	1.2GPa
Bulk modulus	not sourced	4.23GPa
Speed of sound	2,673m/s	1,665m/s
Thermal
Thermal conductivity	0.5W/m·Ksourcehot disk (ISO 22007-2), temperature not stated	0.19W/m·Ksourcetypical
Thermal expansion	20µm/m·Ksourceflow direction (MD), mean 50-150 °C	70µm/m·Ksource0-50 °C
100 mm part over a 50 °C swing	100µm growth3.5x less	350µm growth
Specific heat	839J/kg·KsourceASTM E1269, temperature not stated	1,470J/kg·Ksourcetypical
Heats up and cools (diffusivity)	0.37mm²/s3.41x faster	0.109mm²/s
Thermal shock resistance	not sourced	41.5W/m
Max service temperature	288°CsourceHDT 1.8 MPa (ISO 75)	80°Csourcemax. permanent service 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.	Röhm PLEXIGLAS GS 0F00 cast acrylic sheet, typical values at 23 °C / 50 % RH (Röhm Technical Information Ref. No. 211-1)

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 PMMA?

Plastic LCP GF30 is stronger: its tensile strength is 115 MPa against 80 MPa for Plastic PMMA (44%).

Which is lighter, Plastic LCP GF30 or Plastic PMMA?

Plastic PMMA is lighter: 1,190 kg/m³ against 1,610 kg/m³ for Plastic LCP GF30.

Which is stiffer, Plastic LCP GF30 or Plastic PMMA?

Plastic LCP GF30 is stiffer: Young's modulus 11.5 GPa against 3.3 GPa for Plastic PMMA, 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 PMMA?

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; Plastic PMMA is lighter for a strong beam, strong panel or plate.

Part that must be	Plastic LCP GF30	Plastic PMMA
Stiff rod or tie (tension)	lighter	2.58x heavier
Stiff beam (bending)	lighter	38% heavier
Stiff panel or plate	lighter	12% heavier
Strong rod or tie	lighter	6% heavier
Strong beam	6% heavier	lighter
Strong panel or plate	13% heavier	lighter

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 PMMA?

Plastic LCP GF30 conducts heat better: 0.5 W/m·K against 0.19 W/m·K for Plastic PMMA.

Which expands less with temperature?

Plastic LCP GF30 expands less: 20 µm/m·K against 70 µm/m·K for Plastic PMMA.

Among 72 materials

Stiffness against density

Strength against density