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PAR vs. PPE

Both PAR and PPE are thermoplastics. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is PAR and the bottom bar is PPE.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.0
2.3
Elongation at Break, % 50
30
Flexural Strength, MPa 75
75
Tensile Strength: Ultimate (UTS), MPa 67
55

Thermal Properties

Glass Transition Temperature, °C 190
85
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 170
120
Specific Heat Capacity, J/kg-K 1200
1200
Thermal Conductivity, W/m-K 0.18
0.22
Thermal Expansion, µm/m-K 88
90

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 16
19
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
13

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.1
Water Absorption After 24 Hours, % 0.26
0.23

Common Calculations

Stiffness to Weight: Axial, points 0.93
1.2
Stiffness to Weight: Bending, points 35
42
Strength to Weight: Axial, points 16
14
Strength to Weight: Bending, points 31
30
Thermal Diffusivity, mm2/s 0.13
0.17
Thermal Shock Resistance, points 27
19