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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