Polyphenylsulfone (PPSU)
PPSU is a thermoplastic, further classified as a sulfone plastic. It has a moderately high tensile strength among the thermoplastics in the database. The graph bars on the material properties cards below compare PPSU to: sulfone plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Compressive (Crushing) Strength
140 MPa 20 x 103 psi
Elastic (Young's, Tensile) Modulus
3.6 GPa 0.52 x 106 psi
Elongation at Break
26 %
Flexural Modulus
4.7 GPa 0.69 x 106 psi
Flexural Strength
130 MPa 18 x 103 psi
Impact Strength: Notched Izod
80 J/m 1.5 ft-lb/in
Rockwell M Hardness
84
Rockwell R Hardness
130
Tensile Strength: Ultimate (UTS)
95 MPa 14 x 103 psi
Thermal Properties
Glass Transition Temperature
220 °C 430 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
210 °C 410 °F
Heat Deflection Temperature At 455 kPa (66 psi)
220 °C 420 °F
Maximum Temperature: Autoignition
580 °C 1070 °F
Maximum Temperature: Decomposition
560 °C 1040 °F
Maximum Temperature: Mechanical
160 °C 330 °F
Specific Heat Capacity
970 J/kg-K 0.23 BTU/lb-°F
Thermal Conductivity
0.24 W/m-K 0.14 BTU/h-ft-°F
Thermal Expansion
45 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
3.8
Dielectric Constant (Relative Permittivity) At 1 MHz
3.4
Dielectric Strength (Breakdown Potential)
16 kV/mm 0.61 V/mil
Electrical Dissipation At 1 Hz
0.0020
Electrical Resistivity Order of Magnitude
14 10x Ω-m
Otherwise Unclassified Properties
Density
1.4 g/cm3 88 lb/ft3
Limiting Oxygen Index (LOI)
38 %
Water Absorption After 24 Hours
0.44 %
Common Calculations
Stiffness to Weight: Axial
1.4 points
Stiffness to Weight: Bending
36 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
0.17 mm2/s
Thermal Shock Resistance
42 points
Followup Questions
Further Reading
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999