MDPE vs. PPA

Both MDPE and PPA are thermoplastics. There are 9 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 MDPE and the bottom bar is PPA.

Medium Density Polyethylene (MDPE)Polyphthalamide (PPA)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		0.93
Density, g/cm³		1.1

Elastic (Young's, Tensile) Modulus, GPa		0.6
Elastic (Young's, Tensile) Modulus, GPa		2.1 to 2.2

Glass Transition Temperature, °C		-80
Glass Transition Temperature, °C		92 to 130

Melting Onset (Solidus), °C		120
Melting Onset (Solidus), °C		310

Specific Heat Capacity, J/kg-K		2350
Specific Heat Capacity, J/kg-K		1400

Stiffness to Weight: Axial, points		0.36
Stiffness to Weight: Axial, points		1.0 to 1.1

Stiffness to Weight: Bending, points		30
Stiffness to Weight: Bending, points		38

Thermal Conductivity, W/m-K		0.4
Thermal Conductivity, W/m-K		0.15

Thermal Diffusivity, mm²/s		0.18
Thermal Diffusivity, mm²/s		0.095

MDPE vs. PPA

Material Properties

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