Polytetrafluoroethylene
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Cite "Polytetrafluoroethylene"
Polytetrafluoroethylene. (n.d.). In Compound. Retrieved from /th/compound/polytetrafluoroethylene/
"Polytetrafluoroethylene." Compound, /th/compound/polytetrafluoroethylene/.
@misc{polytetrafluoroethylene, title={Polytetrafluoroethylene}, url={/th/compound/polytetrafluoroethylene/}}
IUPAC: Poly(tetrafluoroethylene)
CAS: 9002-84-0
ภาพรวม
PTFE, marketed as Teflon, has the lowest coefficient of friction of any known solid. The strong C-F bonds make it almost completely chemically inert and non-stick. It was accidentally discovered by Roy Plunkett in 1938 while working on refrigerant gases.
องค์ประกอบ
การใช้งาน
- • Non-stick cookware coating
- • Chemical-resistant gaskets and seals
- • Plumber's tape (thread seal tape)
- • Gore-Tex waterproof fabric
ข้อเท็จจริงที่น่าสนใจ
- ✦ Discovered accidentally when a gas cylinder appeared empty but actually contained polymerized PTFE
- ✦ Nothing sticks to Teflon because of the extremely strong C-F bonds that create a low-energy surface
ความปลอดภัย
- ⚠ Overheating above 260°C releases toxic fumes
- ⚠ PFAS environmental persistence ('forever chemicals')
- ⚠ Polymer fume fever from decomposition
คุณสมบัติ
- ประเภท
- polymer
- สถานะ
- solid
- มวลโมลาร์
- 100.02 g/mol
- ความหนาแน่น
- 2.2000 g/cm³
- จุดหลอมเหลว
- 327.0 °C
- การละลาย
- insoluble