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PETG vs. Silicone Plastic

PETG belongs to the thermoplastics classification, while silicone plastic belongs to the thermoset plastics. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is PETG and the bottom bar is silicone plastic.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.2
9.0
Tensile Strength: Ultimate (UTS), MPa 53
38

Thermal Properties

Glass Transition Temperature, °C 81
200
Specific Heat Capacity, J/kg-K 1200
850
Thermal Conductivity, W/m-K 0.29
0.35
Thermal Expansion, µm/m-K 68
35

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 16
30

Otherwise Unclassified Properties

Density, g/cm3 1.3
1.9

Common Calculations

Stiffness to Weight: Axial, points 1.0
2.6
Stiffness to Weight: Bending, points 34
36
Strength to Weight: Axial, points 12
5.5
Strength to Weight: Bending, points 25
13
Thermal Diffusivity, mm2/s 0.19
0.22
Thermal Shock Resistance, points 25
8.5