General Properties
Short Name:
Name:
PESU
Polyethersulfone
Polyethersulfone (PESU) is an amorphous, aromatic high-temperature polymer and belongs to the group of polysulfones; it is, however, superior to pure polysulfone with respect to chemical resistance and impact strength.
Structural Formula
Properties
| Glass Transition Temperature | 225 to 230°C |
|---|---|
| Melting Temperature | - |
| Melting Enthalpy | - |
| Decomposition Temperature | 580 to 595°C |
| Young's Modulus | 2600 to 2800 MPa |
| Coefficient of Linear Thermal Expansion | 60 *10-6/K |
| Specific Heat Capacity | 1.37 J/(g*K) |
| Thermal Conductivity | 0.18 W/(m*K) |
| Density | 1.37 g/cm³ |
| Morphology | Amorphous material |
| General properties | High stability, stiffness and hardness. High deformation resistance. Very good heat and OxidationOxidation kann im Zusammenhang mit thermischer Analyse verschiedene Vorgänge bezeichnen.oxidation resistance. Good electrical insulation properties. Hydrolysis-resistant to aqueous and alkaline media |
| Processing | Extrusion, injection molding |
| Applications | Instrument and apparatus engineering. Automobile and aircraft industry. Electrical and electronical components. Medical engineering. Photo equipment |
NETZSCH Measurement
| Instrument | DSC 204 F1 Phoenix® |
| Sample Mass | 12.66 mg |
| Isothermal Phase | 5 min |
| Heating/Colling Rates | 10 K/min |
| Crucible | Al, pierced lid |
| Atmosphere | N2 (40 ml/min) |
Evaluation
The glass transition of the amorphous PESU occurred at 228°C (midpoint) with a step height of 0.23 J/(g*K) and 0.24 J/(g*K) in the 1st (blue) and 2nd heating (red), respectively. In the DSC curve of the 2nd heating, the glass transition step is overlapped by a small RelaxationWhen a constant strain is applied to a rubber compound, the force necessary to maintain that strain is not constant but decreases with time; this behavior is known as stress relaxation. The process responsible for stress relaxation can be physical or chemical, and under normal conditions, both will occur at the same time. relaxation peak, indicating the presence of ordered regions within the amorphous matrix that formed during the controlled cooling at 10 K/min.