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PP Copolymer vs. PS

Both PP copolymer and PS are thermoplastics. There are 12 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is PP copolymer and the bottom bar is PS.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.9 to 1.1
1.9 to 2.9
Elongation at Break, % 12
1.8 to 40
Flexural Strength, MPa 31
62 to 80
Impact Strength: Notched Izod, J/m 110 to 350
19 to 45
Tensile Strength: Ultimate (UTS), MPa 23 to 33
32 to 44

Thermal Properties

Maximum Temperature: Mechanical, °C 80
70

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 21 to 22
18 to 20

Otherwise Unclassified Properties

Density, g/cm3 0.9
1.0

Common Calculations

Stiffness to Weight: Axial, points 0.56 to 0.68
1.0 to 1.5
Stiffness to Weight: Bending, points 36 to 38
40 to 45
Strength to Weight: Axial, points 7.1 to 10
8.5 to 12
Strength to Weight: Bending, points 20 to 25
22 to 26