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