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PP Homopolymer vs. PS

Both PP homopolymer and PS are thermoplastics. There are 11 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 3.0 to 80
1.8 to 40
Flexural Strength, MPa 41 to 100
62 to 80
Impact Strength: Notched Izod, J/m 42 to 95
19 to 45
Tensile Strength: Ultimate (UTS), MPa 36 to 93
32 to 44

Thermal Properties

Glass Transition Temperature, °C 170
100
Maximum Temperature: Mechanical, °C 120
70
Specific Heat Capacity, J/kg-K 1230 to 1900
1250 to 1400
Thermal Expansion, µm/m-K 30 to 90
80 to 98

Otherwise Unclassified Properties

Density, g/cm3 0.91 to 1.2
1.0

Common Calculations

Strength to Weight: Axial, points 11 to 21
8.5 to 12
Strength to Weight: Bending, points 27 to 37
22 to 26