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PAR vs. UP

PAR belongs to the thermoplastics classification, while UP belongs to the thermoset plastics. There are 16 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.0
17
Elongation at Break, % 50
1.0
Tensile Strength: Ultimate (UTS), MPa 67
30

Thermal Properties

Glass Transition Temperature, °C 190
60
Specific Heat Capacity, J/kg-K 1200
1200
Thermal Conductivity, W/m-K 0.18
0.7
Thermal Expansion, µm/m-K 88
3.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.0
6.0

Otherwise Unclassified Properties

Density, g/cm3 1.2
2.0
Limiting Oxygen Index (LOI), % 35
20

Common Calculations

Stiffness to Weight: Axial, points 0.93
4.7
Stiffness to Weight: Bending, points 35
43
Strength to Weight: Axial, points 16
4.2
Strength to Weight: Bending, points 31
11
Thermal Diffusivity, mm2/s 0.13
0.29
Thermal Shock Resistance, points 27
42