Performance characteristics
| Performance characteristics |
| |
Teflon
(AF)
|
Teflon (PFA) |
| Morphology |
Amorphous
|
Semicrystalline |
| Optical
Clarity
|
Clear:
>95%
|
Translucent to Opaque |
| Upper Use Temperature, °C
(°F) |
285
(545)
|
260 (500) |
| Thermal Stability, °C
(°F)
|
360
(680)
|
380 (716) |
| Thermal Expansion (linear),
ppm/°C
|
80
|
150 |
| Water
Absorption
|
No |
No |
| Weatherability
|
Outstanding
|
Outstanding |
| Flame Resistant LOI,
%
|
95 |
95 |
| Tensile Modulus, MPa
(psi)
|
950–2150 (137,786–311,832) |
271–338 (39,305–49,023) |
| Creep
Resistance
|
Good |
Low |
| Solubility
Selected
|
Solvents
|
No |
| Resistance to Chemical
Attack
|
Excellent |
Excellent |
| Surface-Free
Energy
|
Low |
Low |
| Refractive
Index
|
1.29–1.31
|
1.34–1.35 |
Dielectric
Constant
|
1.89–1.93
|
2.1 |
|
|
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