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PS vs. PETG

Both PS and PETG are thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
2.2
Flexural Strength, MPa 62 to 80
77
Impact Strength: Notched Izod, J/m 19 to 45
77
Tensile Strength: Ultimate (UTS), MPa 32 to 44
53

Thermal Properties

Glass Transition Temperature, °C 100
81
Specific Heat Capacity, J/kg-K 1250 to 1400
1200
Thermal Conductivity, W/m-K 0.14 to 0.22
0.29
Thermal Expansion, µm/m-K 80 to 98
68

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 18 to 20
16

Otherwise Unclassified Properties

Density, g/cm3 1.0
1.3
Water Absorption After 24 Hours, % 0.040 to 0.080
0.2

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
1.0
Stiffness to Weight: Bending, points 40 to 45
34
Strength to Weight: Axial, points 8.5 to 12
12
Strength to Weight: Bending, points 22 to 26
25
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.19
Thermal Shock Resistance, points 11 to 15
25