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PAR vs. PEEK

Both PAR and PEEK are thermoplastics. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 93
120 to 300
Elastic (Young's, Tensile) Modulus, GPa 2.0
4.0 to 24
Elongation at Break, % 50
1.6 to 43
Flexural Modulus, GPa 2.1
3.8 to 19
Flexural Strength, MPa 75
150 to 330
Impact Strength: Notched Izod, J/m 220
78 to 120
Rockwell R Hardness 130
120
Tensile Strength: Ultimate (UTS), MPa 67
97 to 200

Thermal Properties

Glass Transition Temperature, °C 190
240
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 170
160 to 300
Maximum Temperature: Decomposition, °C 470
570
Specific Heat Capacity, J/kg-K 1200
1390 to 1700
Thermal Conductivity, W/m-K 0.18
0.25 to 0.93
Thermal Expansion, µm/m-K 88
15 to 52

Electrical Properties

Electrical Resistivity Order of Magnitude, 10x Ω-m 12
3.0 to 14

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.3 to 1.5
Limiting Oxygen Index (LOI), % 35
38
Water Absorption After 24 Hours, % 0.26
0.060 to 0.3

Common Calculations

Stiffness to Weight: Axial, points 0.93
1.5 to 10
Stiffness to Weight: Bending, points 35
36 to 73
Strength to Weight: Axial, points 16
20 to 41
Strength to Weight: Bending, points 31
36 to 55
Thermal Diffusivity, mm2/s 0.13
0.1 to 0.51
Thermal Shock Resistance, points 27
34 to 57