PCTFE (POLYCHLOROTRIFLUOROETHYLENE)
Material Information
PCTFE is a thermoplastic that is produced by the polymerization of chlorotrifluoroethylene. It offers a unique combination of physical and mechanical properties, nonflammability, chemical resistance, very low moisture absorption, and excellent electrical properties. All of these characteristics are found over a useful temperature range (-400º F to 400º F). However, over 212º F a few solvents may dissolve the material or cause it to swell. It also has extremely low outgassing, which makes it a good option for aerospace and flight applications. It can be processed by compression molding or extrusion, and can be machined to precise tolerances. PCTFE is available in the form of rod, sheet, and tubing.
Application
- Aircraft/Aerospace applications
- Laboratory equipment components
- Electronic/Electrical applications
- Medical/Pharmaceutical applications
- Valve seats
- Seals
- O-rings
- Gaskets
- Bearings
Properties
- Excellent chemical resistance
- Near zero moisture absorption
- Low creep and cold flow
- Ultraviolet stability
- High optical transparency (thin films)
- Continuous usage temperature of -400º F to 400º F
- Low coefficient of thermal expansion
- Excellent electrical insulator
- Non-flammable
- Very low outgassing
Physical |
Astm Test Method |
PCTFE |
| Density (lb/in^3) | D792 | 0.077 |
| Specific Gravity | D792 | 2.13 |
| Water Absorption @ 24 hours (%) | D570 | – |
Mechanical |
||
| Tensile Strength (PSI) | D638 | 5,300 |
| Tensile Modulus (PSI) | D638 | 207,000 |
| Tensile Elongation at Break (%) | D638 | 150 |
| Flexural Strength (PSI) | D790 | 8,500 |
| Flexural Modulus (PSI) | D790 | 180,000 |
| Compressive Strength | D695 | 5,500 |
| Compressive Modulus (PSI) | D695 | 180,000 |
| IZOD Notched Impact (ft-lb/in) | D256 | 5 |
| Shore D Hardness | D785 | D90 |
Thermal |
||
| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 7 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 258 |
| Melting Point, °F | D3418 | 415 |
| Continous Service Temp (Operating), °F | – | 270 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | 1.45 |
| Flammability Rating | UL94 | VO |
Electrical |
||
| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | 500 |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | 10^18 |
| Dielectric Constant at 1 MHz | D150 | – |
| Dissipation Factor at 1 MHz | D150 | – |
NOTE:
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.