danwoo21 Posted November 28, 2009 Share Posted November 28, 2009 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. Link to comment Share on other sites More sharing options...
John Cuthber Posted November 28, 2009 Share Posted November 28, 2009 It isn't. Tetrafluoroethylene is a gas. Polytetrafluoroethylene is a thermoplastic. Link to comment Share on other sites More sharing options...
danwoo21 Posted November 29, 2009 Author Share Posted November 29, 2009 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. Link to comment Share on other sites More sharing options...
John Cuthber Posted November 29, 2009 Share Posted November 29, 2009 IIRC ptfe melts at about 325C and you fry things at about 250C. Link to comment Share on other sites More sharing options...
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