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PS vs. LDPE

Both PS and LDPE are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
0.3
Tensile Strength: Ultimate (UTS), MPa 32 to 44
7.0

Thermal Properties

Glass Transition Temperature, °C 100
-130
Maximum Temperature: Autoignition, °C 360 to 420
380
Maximum Temperature: Decomposition, °C 320 to 330
400
Specific Heat Capacity, J/kg-K 1250 to 1400
2300
Thermal Conductivity, W/m-K 0.14 to 0.22
0.36
Thermal Expansion, µm/m-K 80 to 98
220
Vicat Softening Temperature, °C 100 to 110
50

Otherwise Unclassified Properties

Density, g/cm3 1.0
0.92

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
0.18
Stiffness to Weight: Bending, points 40 to 45
24
Strength to Weight: Axial, points 8.5 to 12
2.1
Strength to Weight: Bending, points 22 to 26
8.8
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.17
Thermal Shock Resistance, points 11 to 15
7.6