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Liquid Crystal Polymer (LCP)

LCP is a thermoplastic, further classified as a polyester plastic. It can have the highest mechanical heat stability among polyester plastics. In addition, it has the highest melting temperature and can have the highest tensile strength.

The properties of LCP include three common variations. The property values on this page show ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare LCP to: polyester plastics (top), all thermoplastics (middle), and the entire database (bottom). The length of each bar shows the given value as a % of the largest value in the relevant set.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

11 to 24 GPa 1.6 to 3.5 x 106 psi

Elongation at Break

1.0 to 3.0 %

Flexural Modulus

9.0 to 23 GPa 1.3 to 3.3 x 106 psi

Flexural Strength

160 to 320 MPa 23 to 46 x 103 psi

Tensile Strength: Ultimate (UTS)

180 to 230 MPa 26 to 33 x 103 psi

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi)

240 to 270 °C 470 to 520 °F

Melting Onset (Solidus)

280 °C 540 °F

Specific Heat Capacity

1020 to 1200 J/kg-K 0.24 to 0.29 BTU/lb-°F

Otherwise Unclassified Properties

Density

1.4 to 1.6 g/cm3 87 to 100 lb/ft3

Limiting Oxygen Index (LOI)

35 %

Common Calculations

Stiffness to Weight: Axial

4.4 to 8.9 points

Stiffness to Weight: Bending

51 to 65 points

Strength to Weight: Axial

33 to 43 points

Strength to Weight: Bending

45 to 56 points

Followup Questions

Further Reading

Liquid Crystalline Polymers, Xin-Jiu Wang and Qi-Feng Zhou, 2004

SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000

Modern Plastics Handbook, Charles A. Harper (editor), 1999

Plastics Materials, 7th ed., J. A. Brydson, 1999