PTFE®, or Polytetrafluoroethylene, is a linear polymer like polyethylene, the only difference being that instead of hydrogen atoms there are fluorine atoms. It has a very high crystallinity as manufactured - about 90 percent. PTFE® is insoluble in most solvents, uniquely nonadhesive, and has low friction properties. PTFE® has constant electrical and mechanical properties from 20 to about 250 degrees Celsius, and it has high impact strength. PTFE® is typically used as coatings for frying pans, for wire and cable insulation, and insulation for motors and generators.
The repeating unit of PTFE® is -CF2-CF2- and the structure of PTFE®:
A full range of PTFE® are available at American Seal & Packing
is a registered trademark of DuPont.
Copyright © 1995 Massachusetts Institute of Technology. All rights reserved.