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 Polycarbonate
Covestro Makrolon 2405 general-purpose PC (MVR 19), Covestro technical datasheet version 2026-09-28, typical values
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Makrolon 2405 Technical Data SheetCovestroPlastic Polycarbonate · Yield strength: typical, tensile yieldPlastic Polycarbonate · Ultimate tensile strength: typical, stress at breakPlastic Polycarbonate · Flexural strength: typical, flexural strengthPlastic Polycarbonate · Elongation at break: typical, strain at breakPlastic Polycarbonate · Young's modulus (stiffness): typicalPlastic Polycarbonate · Density: typicalPlastic Polycarbonate · Thermal conductivity: typical, through-plane, 23 CPlastic Polycarbonate · Thermal expansion: typical, 23-55 C, parallel and normalPlastic Polycarbonate · Glass transition: typical, DSC 10 C/minPlastic Polycarbonate · Max service temperature: UL 746B RTI, tensile strength, 1.5 mm
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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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Engineering Polymers Part and Mold Design: Thermoplastics, A Design GuideCovestroarchived copyPlastic Polycarbonate · Poisson's ratio: typical, polycarbonate family (Covestro Part and Mold Design guide, Table 3-1)
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Makrolon 2405 Data Sheet, ASTM valuesBayer MaterialSciencearchived copyPlastic Polycarbonate · Specific heat: typical (guide value), Bayer ASTM datasheet for Makrolon 2405, ASTM D 2766
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 Polycarbonate?
Plastic LCP GF30 is stronger: its tensile strength is 115 MPa against yield strength 65 MPa for Plastic Polycarbonate (1.77x).
Which is lighter, Plastic LCP GF30 or Plastic Polycarbonate?
Plastic Polycarbonate is lighter: 1,200 kg/m³ against 1,610 kg/m³ for Plastic LCP GF30.
Which is stiffer, Plastic LCP GF30 or Plastic Polycarbonate?
Plastic LCP GF30 is stiffer: Young's modulus 11.5 GPa against 2.4 GPa for Plastic Polycarbonate, 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 Polycarbonate?
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.
Part that must be
Plastic LCP GF30
Plastic Polycarbonate
Stiff rod or tie (tension)
lighter
3.57x heavier
Stiff beam (bending)
lighter
1.63x heavier
Stiff panel or plate
lighter
26% heavier
Strong rod or tie
lighter
32% heavier
Strong beam
lighter
9% heavier
Strong panel or plate
about equal
about equal
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 Polycarbonate?
Plastic Polycarbonate stretches further before it breaks: 125% elongation at break against 1.5% for Plastic LCP GF30.
Thermal
Which conducts heat better, Plastic LCP GF30 or Plastic Polycarbonate?
Plastic LCP GF30 conducts heat better: 0.5 W/m·K against 0.2 W/m·K for Plastic Polycarbonate.
Which expands less with temperature?
Plastic LCP GF30 expands less: 20 µm/m·K against 65 µm/m·K for Plastic Polycarbonate.