
Radel® Family
Radel® WM

Radel® WM Polyphenylsulfone (PPSU) is a transparent and rigid high-temperature engineering thermoplastic and belongs to the sulfone family of polymers. PPSU is the highest performing sulfone polymer. It is known for its extreme toughness, high flexural and tensile strength, excellent hydrolytic stability and good resistance to chemicals and heat. It is highly resistant to aqueous mineral acids, bases, and oxidizing agents and most solvents. It excels in high heat and humidity environments and provides operating temperatures around 200°C (392°F). Westlake’s Radel® WM stock shapes are made exclusively from Solvay, Radel® PPSU. Its regulatory compliance profile and lot-traceability make it ideal for use in medical and life science applications. Sterilization methods include EtO gas, radiation, steam autoclaving, dry heat, and cold sterilization. PPSU is intrinsically flame retardant, and offers high impact strength and good chemical resistance. PPSU is often an excellent choice for components that are exposed to high temperatures and corrosive media because of its exceptional chemical resistance. Examples include pipe fittings, battery containers, medical device parts, and sterilizable products for healthcare applications. Polyphenylsulfone is also used in the automotive and aerospace industries for applications where superior thermal and mechanical properties relative to other engineering grade resins are required.
Industry
Attributes
Typical Properties


Property | Test Standard | English Units | Metric Units |
Mechanical | |||
Flexural Modulus | D790 | 349 kpsi | 2,410 MPa |
Flexural Strength - 5% | D790 | 13 kpsi | 91 MPa |
Izod Impact, notched | D256 | 12.9 ft-lb/in | 690 J/m |
Tensile Elongation @ Break | D638 | 60-120% | 60-120% |
Tensile Elongation @ Yield | D638 | 7.20 % | 7.20 % |
Tensile Modulus | D638 | 339 kpsi | 2,340 MPa |
Tensile Strength @ Break | D638 | 10 kpsi | 69.6 MPa |
Thermal | |||
HDT @ 264 psi | D648 | 404 °F | 207 °C |
Physical | |||
Moisture Absorption | D570 | 0.37 % | 0.37 % |
Specific Gravity | D792 | 1.29 | 1.29 |
Electrical | |||
Volume Resistivity | D257 | 30.9^13 ohm-ft | 10^15 ohm-cm |
Rod Sizing
Sheet Sizing
Film Sizing
Slab Sizing
Compression Sheet Sizing
Extruded Sheet Sizing
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