Polytetrafluoroethylene

(C₂F₄)ₙ

IUPAC: Poly(tetrafluoroethylene)

CAS: 9002-84-0

概述

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.

组成

元素 符号 原子 原子质量
Carbon C 2 12.0110
Fluorine F 4 18.9980

元素组成

C
Carbon ×2
24.0%
F
Fluorine ×4
76.0%

用途

  • • Non-stick cookware coating
  • • Chemical-resistant gaskets and seals
  • • Plumber's tape (thread seal tape)
  • • Gore-Tex waterproof fabric

趣味知识

  • ✦ 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

安全性

  • ⚠ Overheating above 260°C releases toxic fumes
  • ⚠ PFAS environmental persistence ('forever chemicals')
  • ⚠ Polymer fume fever from decomposition

属性

类型
polymer
状态
solid
摩尔质量
100.02 g/mol
密度
2.2000 g/cm³
熔点
327.0 °C
溶解度
insoluble

别名

Teflon PTFE

相关化合物

Cellulose

(C₆H₁₀O₅)ₙ

Epoxy Resin DGEBA

C₂₁H₂₄O₄

Kevlar

(C₁₄H₁₀N₂O₂)ₙ

Nylon-6,6

(C₁₂H₂₂N₂O₂)ₙ

Sodium Polyacrylate

(C₃H₃NaO₂)ₙ

Polyethylene

(C₂H₄)ₙ

Polylactic Acid

(C₃H₄O₂)ₙ

Polymethyl Methacrylate

(C₅H₈O₂)ₙ

Polyurethane

(C₃H₂NO)ₙ

Polycarbonate

(C₁₆H₁₄O₃)ₙ

Frequently Asked Questions

What is Polytetrafluoroethylene?
Polytetrafluoroethylene ((C₂F₄)ₙ) is a polymer compound with the IUPAC name Poly(tetrafluoroethylene).
What is the molecular weight of Polytetrafluoroethylene?
Polytetrafluoroethylene has a molar mass of 100.015 g/mol.
What state is Polytetrafluoroethylene at room temperature?
Polytetrafluoroethylene is a solid at room temperature.
Is Polytetrafluoroethylene organic or inorganic?
Polytetrafluoroethylene is classified as an inorganic compound.
What elements make up Polytetrafluoroethylene?
Polytetrafluoroethylene ((C₂F₄)ₙ) is composed of Carbon (C), Fluorine (F).