Why is the Tetrafluoroethylene thermosetting resin?

[danwoo21]

I learned that all the plastics which is made up of 'addition polymerization' are thermoplastic while most of the plastics which consist of 'condensation polymerization' are thermosetting resin except the polyethylene terephthalate.

 

My question is "Why is the Tetrafluoroethylene thermosetting resin?"

I would appreciate if you let me know the answer.

[John Cuthber]

It isn't.

Tetrafluoroethylene is a gas.

Polytetrafluoroethylene is a thermoplastic.

[danwoo21]

Thank you Cuthber, but I am curious about the criteria

between thermosetting and thermoplastic

because Polytetrafluoroethylene(Teflon) is used

to coat frying pans even though it is thermoplastic.

[John Cuthber]

IIRC ptfe melts at about 325C and you fry things at about 250C.