FEP: Tetrafluoroethylene/hexafluoropropylene copolymer
- Short Name
- FEP
- Name
- Tetrafluoroethylene/hexafluoropropylene copolymer
- Group
- HTRTP - High-Temperature Resistant Thermoplastics
- General Properties
- Chemical Formula
- Structural Formula
-
Properties
- Glass Transition Temperature
- - °C
- Melting Temperature
- 253 to 282 °C
- Melting Enthalpy
- - J/g
- Decomposition Temperature
- 510 to 600 °C
- Young's Modulus
- 350 MPa
- Coefficient of Linear Thermal Expansion
- 80 *10¯6/K
- Specific Heat Capacity
- 1.12 J/(g*K)
- Thermal Conductivity
- 0.25 W/(m*K)
- Density
- 2.12 to 2.17 g/cm³
- Morphology
- Semi-crystalline thermoplastic
- General properties
- Good chemical resistance. High impact strength. Smooth surface
- Processing
- Injection molding, extrusion
- Applications
- Heating cables, heating tapes. Electronics (e.g., wires, cables on the communication sector). Chemical industry (lining for valves, tubes, container). Solar cells (layer films)
Internet Links
NETZSCH Measurements
- Instrument
- DSC 204 F1 Phoenix®
- Sample Mass
- 11.12 mg
- Isothermal Phase
- 5 min
- Heating/Colling Rates
- 10 K/min
- Crucible
- Al, pierced
- Atmosphere
- N2 (50 ml/min)
Evaluation
The present FEP sample shows an endothermal melting effect at 266°C (peak temperature, 2nd heating, green) in the temperature range between 0°C and 310°C with a melting enthalpy of 24 J/g.
The shift of the peak temperature of more than 2 K to lower values in the 2nd heating (266°C compared to 268°C in the 1st heating, blue) can be explained by a better contact between the sample and crucible bottom after the first melting. The melting peak in the 1st heating (blue) is a bit slimmer compared to the 2nd heating; this indicates a narrower distribution of crystallites.
The shift of the peak temperature of more than 2 K to lower values in the 2nd heating (266°C compared to 268°C in the 1st heating, blue) can be explained by a better contact between the sample and crucible bottom after the first melting. The melting peak in the 1st heating (blue) is a bit slimmer compared to the 2nd heating; this indicates a narrower distribution of crystallites.