Polypropylene (PP) Copolymer
PP copolymer is a thermoplastic, further classified as a polypropylene plastic. It has a fairly low density and can have a moderately low tensile strength among thermoplastics.
The properties of PP copolymer include three common variations. This page shows summary 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 PP copolymer to: polypropylene 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
0.9 to 1.1 GPa 0.13 to 0.16 x 106 psi
Elongation at Break
12 %
Flexural Modulus
1.3 GPa 0.18 x 106 psi
Flexural Strength
31 MPa 4.5 x 103 psi
Impact Strength: Notched Izod
110 to 350 J/m 2.0 to 6.6 ft-lb/in
Tensile Strength: Ultimate (UTS)
23 to 33 MPa 3.3 to 4.8 x 103 psi
Thermal Properties
Heat Deflection Temperature At 1.82 MPa (264 psi)
50 to 100 °C 120 to 210 °F
Heat Deflection Temperature At 455 kPa (66 psi)
82 to 98 °C 180 to 210 °F
Maximum Temperature: Mechanical
80 °C 180 °F
Melting Onset (Solidus)
150 °C 300 °F
Other Material Properties
Density
0.9 g/cm3 56 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 Hz
2.2 to 2.3
Dielectric Strength (Breakdown Potential)
21 to 22 kV/mm 0.82 to 0.86 V/mil
Common Calculations
Stiffness to Weight: Axial
0.56 to 0.68 points
Stiffness to Weight: Bending
36 to 38 points
Strength to Weight: Axial
7.1 to 10 points
Strength to Weight: Bending
20 to 25 points
Followup Questions
Further Reading
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
Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012