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Unfilled LCP

Unfilled LCP is a grade of LCP. It has the lowest strength and highest ductility compared to the other variants of LCP. The graph bars on the material properties cards below compare unfilled LCP to: polyester plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

11 GPa 1.6 x 106 psi

Elongation at Break

3.0 %

Flexural Modulus

9.0 GPa 1.3 x 106 psi

Flexural Strength

160 MPa 23 x 103 psi

Tensile Strength: Ultimate (UTS)

180 MPa 26 x 103 psi

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi)

240 °C 470 °F

Maximum Temperature: Decomposition

520 °C 960 °F

Maximum Temperature: Mechanical

240 °C 460 °F

Melting Onset (Solidus)

280 °C 540 °F

Specific Heat Capacity

1200 J/kg-K 0.29 BTU/lb-°F

Thermal Conductivity

0.2 W/m-K 0.12 BTU/h-ft-°F

Electrical Properties

Dielectric Strength (Breakdown Potential)

33 kV/mm 1.3 V/mil

Electrical Resistivity Order of Magnitude

13 10x Ω-m

Otherwise Unclassified Properties

Density

1.4 g/cm3 87 lb/ft3

Limiting Oxygen Index (LOI)

35 %

Common Calculations

Stiffness to Weight: Axial

4.4 points

Stiffness to Weight: Bending

53 points

Strength to Weight: Axial

36 points

Strength to Weight: Bending

51 points

Thermal Diffusivity

0.12 mm2/s

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