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Formula: PSu
Form: Granule
Material: Polysulfone (PSU)
CAS Number: 25135-51-7
Commodity: Polymers
Nominal Granule Size: 3mm
Viscosity: High Viscosity
Color: Natural
PSU (Polysulfone) granules are high-performance thermoplastics with a glass transition temperature of approximately 190°C, making them suitable for high-temperature applications. Their hydrolysis and microbial resistance enable their use in the production of microfiltration and ultrafiltration membranes used in biomedical research and industrial water purification. Polysulfone exhibits high dielectric strength, which supports electrical insulation in aerospace and automotive electronics, ensuring reliability in demanding environments. Additionally, PSU granules are utilized in precision 3D printing for chemically resistant, high-strength laboratory and engineering components used in many research applications.
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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Good
Halogens Good
Ketones Poor
Electrical Properties
Element Value
Dielectric constant @1kHz 3.14
Dielectric constant @1MHz 3.1
Dissipation factor @ 1kHz 0.0013
Dissipation factor @ 1MHz 0.005
Dielectric strength( kV mm⁻¹ ) 17
Volume resistivity( Ohmcm ) 5x10¹⁶
Physical Properties
Element Value
Flammability HB
Radiation resistance Good
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 30
Water absorption( % ) 0.4
Water absorption - equilibrium( % ) 0.85
Density( gcm⁻³ ) 1.24
Mechanical Properties
Element Value
Hardness - Rockwell M91
Elongation at break( % ) 50-100
Tensile modulus( GPa ) 2.48
Izod impact strength( J m⁻¹ ) 69
Tensile strength( MPa ) 70
Thermal Properties
Element Value
Heat-deflection temperature - 1.8MPa( C ) 174
Upper working temperature( C ) 150-180
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.26
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 56

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