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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


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