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PAI vs. PAR

Both PAI and PAR are thermoplastics. There are 22 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 PAI and the bottom bar is PAR.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 260 to 300
93
Elastic (Young's, Tensile) Modulus, GPa 4.0 to 8.3
2.0
Elongation at Break, % 3.0 to 12
50
Flexural Modulus, GPa 4.0 to 6.8
2.1
Flexural Strength, MPa 160 to 320
75
Impact Strength: Notched Izod, J/m 45 to 140
220
Tensile Strength: Ultimate (UTS), MPa 100 to 180
67

Thermal Properties

Glass Transition Temperature, °C 280
190
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 280
170
Maximum Temperature: Decomposition, °C 490
470
Specific Heat Capacity, J/kg-K 910 to 1000
1200
Thermal Conductivity, W/m-K 0.26 to 0.53
0.18
Thermal Expansion, µm/m-K 15 to 34
88

Otherwise Unclassified Properties

Density, g/cm3 1.4 to 1.6
1.2
Limiting Oxygen Index (LOI), % 45
35
Water Absorption After 24 Hours, % 0.3 to 0.4
0.26

Common Calculations

Stiffness to Weight: Axial, points 1.6 to 3.2
0.93
Stiffness to Weight: Bending, points 38 to 47
35
Strength to Weight: Axial, points 19 to 34
16
Strength to Weight: Bending, points 33 to 49
31
Thermal Diffusivity, mm2/s 0.16 to 0.41
0.13
Thermal Shock Resistance, points 48 to 110
27