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CAP vs. PPE

Both CAP and PPE are thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 35 to 50
30
Flexural Strength, MPa 29 to 56
75
Tensile Strength: Ultimate (UTS), MPa 28 to 45
55

Thermal Properties

Glass Transition Temperature, °C 190
85
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 65 to 80
120
Specific Heat Capacity, J/kg-K 1480
1200
Thermal Conductivity, W/m-K 0.25
0.22
Thermal Expansion, µm/m-K 14
90
Vicat Softening Temperature, °C 85 to 110
140

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 3.6
2.7
Dielectric Strength (Breakdown Potential), kV/mm 15
19
Electrical Resistivity Order of Magnitude, 10x Ω-m 16
13

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.1
Water Absorption After 24 Hours, % 1.4 to 1.7
0.23

Common Calculations

Strength to Weight: Axial, points 6.5 to 10
14
Strength to Weight: Bending, points 17 to 23
30
Thermal Diffusivity, mm2/s 0.14
0.17