Polysulfone (PSU) is synthesized from Bisphenol A and 4.4′-Dichlorodiphenyl Sulfone. PSU offers excellent performance in chemical resistance, heat stability (heat deflection temperature of 170℃), and impact strength. With the above characteristics, PSU is a kind of high performance engineering thermoplastic resin.
POLYSULFONE (PSU): TECHNICAL DATA SHEET
| Category | Specifications |
|---|
| Polymer Type | High-performance thermoplastic |
| Chemical Structure | Aromatic sulfone polymer |
| CAS No. | 25135-51-7 |
| Appearance | Amber-transparent pellets |
| Density | 1.24 g/cm³ |
| Glass Transition Temp (Tg) | 185°C |
| Continuous Service Temp | -100°C to +180°C |
Key Properties
| Property | Performance Data |
|---|
| Tensile Strength | 70-75 MPa |
| Flexural Modulus | 2.6-2.8 GPa |
| HDT @1.82MPa | 175-180°C |
| Dielectric Strength | 15-17 kV/mm |
| Hydrolysis Resistance | Excellent (pH 2-13) |
Grades & Modifications
| Grade | Characteristics |
|---|
| Standard PSU | Unfilled, medical/industrial |
| PSU + 30% Glass Fiber | Higher rigidity, HDT 205°C |
| PSU + Carbon Fiber | ESD/conductive applications |
| Medical Grade | USP Class VI, ISO 10993 compliant |
Processing Parameters
| Parameter | Conditions |
|---|
| Injection Molding | Barrel: 320-380°C, Mold: 120-160°C |
| Extrusion | 340-390°C |
| Drying | 4h @120-150°C |
| Melt Flow Rate | 5-25 g/10min (343°C/2.16kg) |
Applications
| Industry | Uses |
|---|
| Medical | Sterilizable devices, dialysis components |
| Aerospace | Cabin interiors, ducting |
| Food Processing | Steam-resistant parts |
| Electrical | Circuit boards, connectors |
| Water Treatment | Membrane housings |
Safety & Compliance
| Aspect | Details |
|---|
| Flammability (UL94) | V-0 (0.8mm) |
| Regulatory | FDA 21 CFR 177.1655, EU 10/2011 |
| Autoclaving | 1000+ cycles @134°C |
| Chemical Resistance | Resists alcohols, acids, oils |
Comparison with Other High-Temp Plastics
| Property | PSU | PEEK | PEI |
|---|
| Max Continuous Temp | 180°C | 250°C | 170°C |
| Cost | $$$ | $$$$$ | $$$$ |
| Processability | Excellent | Difficult | Good |
| Transparency | Semi-transparent | Opaque | Amber-opaque |
References:
Handbook of Thermoplastics (2nd Ed.) – Olagoke OlabisiASTM D638 – Tensile Properties of Plastics
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