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PS vs. CAP

Both PS and CAP are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is PS and the bottom bar is CAP.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 1.8 to 40
35 to 50
Flexural Strength, MPa 62 to 80
29 to 56
Tensile Strength: Ultimate (UTS), MPa 32 to 44
28 to 45

Thermal Properties

Glass Transition Temperature, °C 100
190
Specific Heat Capacity, J/kg-K 1250 to 1400
1480
Thermal Conductivity, W/m-K 0.14 to 0.22
0.25
Thermal Expansion, µm/m-K 80 to 98
14
Vicat Softening Temperature, °C 100 to 110
85 to 110

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 18 to 20
15
Electrical Resistivity Order of Magnitude, 10x Ω-m 14 to 15
16

Otherwise Unclassified Properties

Density, g/cm3 1.0
1.2
Water Absorption After 24 Hours, % 0.040 to 0.080
1.4 to 1.7

Common Calculations

Strength to Weight: Axial, points 8.5 to 12
6.5 to 10
Strength to Weight: Bending, points 22 to 26
17 to 23
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.14