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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Sumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical values.
Plastic PMMA
Röhm PLEXIGLAS GS 0F00 cast acrylic sheet, typical values at 23 °C / 50 % RH (Röhm Technical Information Ref. No. 211-1)
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SUMIKASUPER LCP Technical Note, Version 04 (2023)Sumitomo Chemicalarchived copyPlastic LCP GF30 · Ultimate tensile strength: tensile strength (ISO 527)Plastic LCP GF30 · Flexural strength: typical (ISO 178)Plastic LCP GF30 · Elongation at break: tensile elongation (ISO 527)Plastic LCP GF30 · Young's modulus (stiffness): tensile modulus (ISO 527)Plastic LCP GF30 · Density: typicalPlastic LCP GF30 · Thermal conductivity: hot disk (ISO 22007-2), temperature not statedPlastic LCP GF30 · Thermal expansion: flow direction (MD), mean 50-150 °CPlastic LCP GF30 · Specific heat: ASTM E1269, temperature not statedPlastic LCP GF30 · Max service temperature: HDT 1.8 MPa (ISO 75)
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PLEXIGLAS GS and XT Technical Information (Ref. No. 211-1)Röhmarchived copyPlastic PMMA · Ultimate tensile strength: typical, 23 °CPlastic PMMA · Compressive strength: compressive yield stress, typicalPlastic PMMA · Flexural strength: typicalPlastic PMMA · Elongation at break: typicalPlastic PMMA · Young's modulus (stiffness): typical, short-termPlastic PMMA · Density: typicalPlastic PMMA · Poisson's ratio: typicalPlastic PMMA · Thermal conductivity: typicalPlastic PMMA · Thermal expansion: 0-50 °CPlastic PMMA · Specific heat: typicalPlastic PMMA · Max service temperature: max. permanent service temperature
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 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 is more ductile, Plastic LCP GF30 or Plastic PMMA?
Plastic PMMA stretches further before it breaks: 5.5% elongation at break against 1.5% for Plastic LCP GF30.
Thermal
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.