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PPE vs. PAR

Both PPE and PAR 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 PPE and the bottom bar is PAR.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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