MakeItFrom.com
Menu (ESC)

PS vs. PBT

Both PS and PBT are thermoplastics. 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 PS and the bottom bar is PBT.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
2.7 to 8.7
Elongation at Break, % 1.8 to 40
2.5 to 43
Flexural Strength, MPa 62 to 80
79 to 210
Tensile Strength: Ultimate (UTS), MPa 32 to 44
58 to 140

Thermal Properties

Glass Transition Temperature, °C 100
40
Maximum Temperature: Autoignition, °C 360 to 420
380
Maximum Temperature: Decomposition, °C 320 to 330
380
Specific Heat Capacity, J/kg-K 1250 to 1400
1040 to 1200

Otherwise Unclassified Properties

Density, g/cm3 1.0
1.3 to 1.5
Limiting Oxygen Index (LOI), % 18
20

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
1.1 to 3.2
Stiffness to Weight: Bending, points 40 to 45
35 to 45
Strength to Weight: Axial, points 8.5 to 12
12 to 25
Strength to Weight: Bending, points 22 to 26
25 to 38