Unfilled PC
Unfilled PC is a grade of PC. It has the lowest strength and highest ductility compared to the other variants of PC. The graph bars on the material properties cards below compare unfilled PC to: otherwise unclassified thermoplastics (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
Compressive (Crushing) Strength
86 MPa 12 x 103 psi
Elastic (Young's, Tensile) Modulus
2.3 GPa 0.34 x 106 psi
Elongation at Break
110 %
Fatigue Strength
6.9 MPa 1.0 x 103 psi
Flexural Modulus
2.3 GPa 0.33 x 106 psi
Flexural Strength
92 MPa 13 x 103 psi
Impact Strength: Notched Izod
440 J/m 8.2 ft-lb/in
Poisson's Ratio
0.38
Rockwell M Hardness
68
Shear Modulus
0.8 GPa 0.12 x 106 psi
Shear Strength
70 MPa 10 x 103 psi
Tensile Strength: Ultimate (UTS)
66 MPa 9.5 x 103 psi
Tensile Strength: Yield (Proof)
62 MPa 9.0 x 103 psi
Thermal Properties
Glass Transition Temperature
150 °C 300 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
130 °C 270 °F
Heat Deflection Temperature At 455 kPa (66 psi)
140 °C 280 °F
Maximum Temperature: Autoignition
500 °C 930 °F
Maximum Temperature: Decomposition
480 °C 890 °F
Maximum Temperature: Mechanical
120 °C 250 °F
Specific Heat Capacity
1200 J/kg-K 0.29 BTU/lb-°F
Thermal Conductivity
0.2 W/m-K 0.11 BTU/h-ft-°F
Thermal Expansion
69 µm/m-K
Vicat Softening Temperature
150 °C 300 °F
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
3.1
Dielectric Strength (Breakdown Potential)
15 kV/mm 0.59 V/mil
Electrical Dissipation At 1 Hz
0.0015
Electrical Dissipation At 1 MHz
0.010
Electrical Resistivity Order of Magnitude
16 10x Ω-m
Otherwise Unclassified Properties
Density
1.2 g/cm3 75 lb/ft3
Limiting Oxygen Index (LOI)
26 %
Refractive Index
1.6
Water Absorption After 24 Hours
0.15 %
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
73 MJ/m3
Resilience: Unit (Modulus of Resilience)
830 kJ/m3
Stiffness to Weight: Axial
1.1 points
Stiffness to Weight: Bending
37 points
Strength to Weight: Axial
15 points
Strength to Weight: Bending
30 points
Thermal Diffusivity
0.14 mm2/s
Thermal Shock Resistance
29 points
Followup Questions
Further Reading
ASTM D883: Standard Terminology Relating to Plastics
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