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LDPE vs. PPA

Both LDPE and PPA are thermoplastics. There are 13 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 LDPE and the bottom bar is PPA.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.3
2.1 to 2.2
Tensile Strength: Ultimate (UTS), MPa 7.0
57 to 69

Thermal Properties

Glass Transition Temperature, °C -130
92 to 130
Maximum Temperature: Decomposition, °C 400
450
Melting Onset (Solidus), °C 110
310
Specific Heat Capacity, J/kg-K 2300
1400
Thermal Conductivity, W/m-K 0.36
0.15

Otherwise Unclassified Properties

Density, g/cm3 0.92
1.1

Common Calculations

Stiffness to Weight: Axial, points 0.18
1.0 to 1.1
Stiffness to Weight: Bending, points 24
38
Strength to Weight: Axial, points 2.1
14 to 17
Strength to Weight: Bending, points 8.8
29 to 33
Thermal Diffusivity, mm2/s 0.17
0.095