Properties of Polysulfone (PSU)

Polysulfone is a type of high-performance thermoplastic polymer known for its excellent thermal and chemical resistance, as well as mechanical strength. It belongs to the family of engineering plastics and is often used in applications that require durability and resistance to harsh environments.

The following table provides a comprehensive list of polysulfone (PSU) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Click on the icon to switch between Metric and Imperial units.

Table of Polysulfone Properties
Physical Properties
Metric
CategoryThermoplastic
Density1240 kg/m3
Water Absorption0.22 %wt/day
Mechanical PropertiesMetric
Yield Tensile Strength70 MPa
Ultimate Compressive Strength96 MPa
Young’s Modulus (E)2.48 GPa
Flexural Modulus2.69 GPa
Poisson’s Ratio (ν)0.37
Elongation at Break75%
Rockwell Hardness (M)69
Thermal PropertiesMetric
Melting Point190 °C
Thermal Conductivity0.259 W/m·K
Specific Heat Capacity (Cp)1255 J/kg·K
Coefficient of Thermal Expansion (αL)3.1×10-5 - 5.1×10-5 1/°C
Glass Transition Temperature (Tg)193 °C
Electrical PropertiesMetric
Relative Permittivity (@1 MHz) (εr)3.14
Electrical Resistivity1016 Ω·cm
Dielectric Field Strength (Ed)166 kV/cm
Optical PropertiesMetric
Refractive Index (589 nm)1.63
Transmittance99%
Hazardous DataMetric
Flammability Rating (ANSI/UL 94)V-0

Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) A.M. Howatson, P.G. Lun, J.D. Todd, P.D. Engineering Tables and Data. United Kingdom: University of Oxford, Department of Engineering Science, 2009.